The Dark Blue Color Code: HEX, RGB, CMYK

Few colors carry as much weight as dark blue across design, fashion, branding, and everyday life.

Dark blue is a cool, non-primary color produced by combining pure blue with black, lowering its lightness while keeping saturation high. It sits at 240 degrees on the color wheel with RGB values of (0, 0, 139), making it one of the deepest, most saturated tones in the blue family.

It signals trust, authority, and calm in ways few other shades can match.

This article covers everything from its exact color codes and named shades to how it performs in interior design, fashion, branding, and paint mixing.

Dark Blue Color Codes

The standard dark blue hex code is #00008B, a pure, high-saturation tone sitting at 240 degrees on the color theory spectrum. It has zero red, zero green, and a blue channel of 139 out of 255.

This places it firmly in cool tone territory, with no warm undertones pulling it toward purple or teal.

• RGB: 0, 0, 139
• HEX: #00008B
• CMYK: 100%, 100%, 0%, 45%
• HSL: 240deg, 100%, 27%

When working across color models, conversions matter. Use an RGB to HEX converter or a HEX to RGB converter to stay accurate between digital and print workflows. For print production, run your values through an RGB to CMYK converter before sending files to press.

Dark blue sits at maximum saturation in its HSL form, with lightness at just 27%. That combination is what gives it the intensity that lighter blues like sky blue or pastel blue simply cannot replicate.

Each pixel rendered in this color on screen draws on the RGB color model. On paper, it relies on CMYK, which gives you a different result depending on paper stock and ink density. For Pantone matching, the closest PMS reference is 2758 C.

If you need to check HSL-based values against screen output, an HSL to RGB converter is the fastest way to verify accuracy.

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Dark Blue Color Palettes

Dark blue anchors well in almost every harmony type. Orange sits directly opposite on the color wheel, making it the true complementary tone. Gold and copper variations of that orange relationship also work particularly well in branding contexts.

The table below covers the main harmony types for #00008B.

Need to build out a full scheme? A color palette generator takes the guesswork out of building these harmony types around any base tone. You can also browse curated blue color palettes, dark color palettes, cool color palettes, or night color palettes for ready-made combinations that pair well with deep blue tones.

For projects that need multiple blues together, muted color palettes and sea color palettes are worth checking out too.

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Dark Blue Shades

Dark blue encompasses multiple variations including midnight blue, navy, Oxford blue, Prussian blue, indigo, and cobalt blue.

Each variation differs in saturation, brightness, and undertone, with some leaning lighter toward periwinkle and others deeper toward near-black. The hue itself stays consistent around 240 degrees, but lightness values can drop as low as 10% or rise to 40% while still reading as genuinely dark blue.

Related colors worth exploring: slate blue, periwinkle, purple-blue, electric blue, and cornflower blue.

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What Are the Primary Attributes of Dark Blue?

Dark blue possesses five primary attributes: high saturation (derived from maximum blue channel intensity), deep lightness (at 27% HSL), cool tone classification (no warm undertones), strong contrast potential (against white and pale tones), and cultural authority (linked to professionalism and trust).

These attributes make it one of the most consistent performers across design disciplines, from UI to print.

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How Is Dark Blue Used in Interior Design?

Dark blue works as both a statement and a foundational color in interior design, creating focused, composed spaces that feel intentional rather than loud.

Designers use it on feature walls, kitchen cabinets, and upholstered furniture to establish a sophisticated atmosphere. It works across contemporary, coastal, and traditional styles alike.

One thing I keep seeing with dark blue interiors: it actually performs better in low-light rooms than you’d expect. Interior designer Corey Damen Jenkins has pointed this out, and it holds up in practice. Rather than fighting a dim room with white paint, dark blue leans into it.

Pair it with brass hardware, warm wood tones, or cream textiles to stop it reading as cold. Combine with gold accents for a richer result, or use white and cream to keep things airy. The visual hierarchy in a room shifts noticeably when dark blue anchors the lower half of a space.

For spatial perception, it tends to make large rooms feel more contained without making them oppressive. That said, in very small rooms it can close things in fast, so use it selectively.

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What Psychology and Emotions Does Dark Blue Evoke?

Dark blue evokes feelings of trust, stability, authority, and calm through its association with deep water and night skies.

Color psychology research indicates dark blue reduces perceived stress, promotes focused thinking, and creates structured environments that support both concentration and confidence.

There’s a reason police uniforms, corporate suits, and financial institution logos lean on this color. It reads as reliable without being aggressive. Western cultures associate it with authority and command. In China, darker indigo tones have historically linked to immortality in Taoist belief.

It can also tip into melancholy if overused without contrast. Blue’s linguistic connection to sadness (“feeling blue”) is worth keeping in mind when applying it across large surfaces without relief colors.

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How Is Dark Blue Applied in Fashion and Clothing?

Dark blue is a genuine wardrobe staple, one of those colors that works in almost any context without much effort. It offers versatility across suits, outerwear, denim, knitwear, and formal wear.

Fashion designers use it for its year-round relevance, its ability to flatter most skin tones, and its capacity to shift between casual and formal with a change of fabric or cut.

Navy blue is technically a shade of dark blue, and it has been a staple of menswear for centuries. The navy suit is arguably the most reliable piece in a professional wardrobe. On the women’s side, dark blue evening wear competes with classic black regularly on the runway.

It pairs well with white, gold, burgundy, and tan. Street style tends to mix dark blue denim with rust or burnt orange for a complementary color hit. Both serif-driven heritage brands and minimal contemporary labels reach for it constantly.

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What Colors Complement and Contrast With Dark Blue?

Dark blue complements orange, gold, white, cream, and emerald green, while contrasting strongly with yellow, coral, and copper.

These combinations produce either polished, high-authority palettes or bold high-energy schemes depending on how much contrast you push. The key is deciding upfront whether you want harmony or tension.

Complementary Colors

Dark Blue + Orange

• Color Theory Basis: Direct opposites on the color wheel, maximum chromatic contrast
• Visual Effect: Bold, energetic, high-visibility pairing
• Best Applications: Sports branding, packaging design, call-to-action buttons in web design
• Ratio Recommendations: 70% dark blue, 30% orange or lower
• Example Uses: Tech product launches, athletic apparel, retail signage

Dark Blue + Gold

• Color Theory Basis: Warm-cool contrast with a muted complementary relationship
• Visual Effect: Prestigious, formal, richly composed
• Best Applications: Luxury branding, packaging design, formal invitations
• Ratio Recommendations: 75% dark blue, 25% gold as accent
• Example Uses: Financial institutions, premium hospitality, award ceremonies

Dark Blue + White

• Color Theory Basis: Maximum lightness contrast, tonal opposites
• Visual Effect: Clean, sharp, highly legible
• Best Applications: Typography-heavy layouts, UI design, healthcare and corporate identities
• Ratio Recommendations: Either color can dominate depending on context
• Example Uses: Government websites, medical branding, editorial print

Dark Blue + Emerald Green

• Color Theory Basis: Adjacent-ish tones with enough hue separation to avoid muddiness
• Visual Effect: Luxurious, deep, jewel-toned
• Best Applications: High-end fashion, interior textiles, editorial photography
• Ratio Recommendations: 60% dark blue, 40% emerald or used as equal blocks
• Example Uses: Autumn/winter fashion collections, premium branding

Contrasting Colors

Dark Blue + Yellow

• Contrast Type: Near-complementary with high luminosity difference
• Visual Impact: Energetic, optimistic, high-visibility
• Best Applications: Warning systems, children’s materials, brand differentiation
• Balance Strategies: Keep yellow as a pure accent, avoid large yellow fields next to dark blue

Dark Blue + Coral

• Contrast Type: Warm-cool split with softer complementary energy than orange
• Visual Impact: Fresh, approachable, coastal
• Best Applications: Lifestyle brands, summer campaigns, poster design
• Balance Strategies: Coral works best at 20-25% of the total palette

Dark Blue + Copper

• Contrast Type: Warm metallic against cool deep tone
• Visual Impact: Sophisticated, artisanal, warm-premium
• Best Applications: Craft branding, fintech, interior design accents
• Balance Strategies: Use copper sparingly as a highlight, not a field color

Color Scheme Types

• Monochromatic: Use tints and shades from near-black navy through to pale cornflower, keeping the 240-degree hue constant
• Analogous: Pull in purple, indigo, and teal for a harmonious cool-tone scheme
• Triadic: Dark blue + red + green, high contrast, needs careful weight distribution
• Split-Complementary: Dark blue + yellow-green + orange-red, softer than straight complementary
• Tetradic: Dark blue + teal + dark yellow + red, complex but manageable with one dominant color

Practical Pairing Guidelines

• 60-30-10 Rule: Dark blue as 60% base, a neutral (white or gray) at 30%, and an accent (gold, orange, coral) at 10%
• Accent Color Strategy: Use emphasis colors at small percentages to guide attention without undermining dark blue’s grounding effect
• Neutral Bridging: Gray, silver, and charcoal all sit comfortably between dark blue and bolder accent colors

A color contrast checker is worth running on any dark blue text or background combination before finalizing a design, especially for accessibility.

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How Does Dark Blue Differ From Similar Cool Colors?

Dark blue differs from navy blue (slightly less lightness, cooler hue), midnight blue (more red in the mix, warmer undertone), royal blue (much higher lightness, brighter feel), and indigo (shifted hue toward purple, around 275 degrees) through its specific balance of zero red, zero green, and a mid-range blue channel at 139.

These differences are subtle on screen but significant in print and physical applications.

Related colors to explore: blue-gray, peacock blue, slate blue, Tiffany blue, misty blue, and mint blue.

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How Do You Create Dark Blue in Different Mediums?

Create dark blue by mixing ultramarine blue with a small amount of black in paint, setting RGB values to (0, 0, 139) in digital design, or targeting 100% cyan and 100% magenta in CMYK for screen-accurate print reproduction where blue channel dominance is the priority.

Acrylic Paint

Start with ultramarine blue as the base. Add a small amount of black, roughly 1 part black to 10 parts blue, and mix thoroughly.

If the result looks too purple, add a tiny amount of phthalo blue to neutralize the warmth. Common mistake: adding black too fast. It gets muddy quickly, and there’s no going back without starting fresh.

• Base pigments: Ultramarine Blue + Phthalo Blue
• Darkening agent: Ivory Black or Mars Black
• Adjustment: Add white in small amounts if too dark, not too much or it goes gray

Oil Paint

Use Prussian Blue and Ultramarine Blue in roughly equal parts. A small touch of Lamp Black deepens the tone without greening it.

Oil pigments shift slightly as they dry, so test swatches first. Prussian Blue in oil tends to green over time in thin applications.

• Pigments: Prussian Blue (PB27) + Ultramarine Blue (PB29)
• Darkening: Lamp Black or Ivory Black
• Drying note: Colors can deepen by 5-10% over 24-48 hours

Watercolor

Phthalo Blue is very dark in mass tone, so repeated layering builds toward near-black on its own. Mix Prussian Blue and Phthalo Blue 50/50 with controlled water ratios for depth without muddiness.

Avoid adding black watercolor in large amounts since it dulls the luminosity that makes watercolor worth using in the first place.

• Pigments: Phthalo Blue + Prussian Blue
• Dilution: Low water-to-pigment for dark saturation
• Layering: Build in glazes, each layer adds depth

Gouache

Gouache behaves similarly to acrylic but dries slightly lighter. Use Ultramarine Blue as the base, darken with Payne’s Gray rather than black to maintain color richness.

• Pigments: Ultramarine Blue + Payne’s Gray
• Note: Gouache dries slightly lighter, account for this when mixing
• Consistency: Keep paint thick for maximum saturation

Print / CMYK

• Cyan: 100%
• Magenta: 100%
• Yellow: 0%
• Black: 45%
• Printing considerations: Coated stock reproduces dark blue more accurately than uncoated; uncoated paper absorbs ink and can shift toward navy or near-black
• Pantone matching: PMS 2758 C (closest match to #00008B)

Use a CMYK to RGB converter to check how your print values translate back to screen, since the round-trip conversion rarely produces a perfect match.

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What Are the Best Practices for Using Dark Blue in Design?

Best practices for dark blue include pairing it with high-contrast light tones, maintaining accessible text contrast ratios, anchoring it as a dominant rather than accent color, and testing across both screen and print outputs.

Designers should watch for color shift between RGB and CMYK, avoid using dark blue for large areas of body text on dark backgrounds, and verify WCAG contrast compliance for any UI application. These steps protect both readability and visual impact.

When used in web design, dark blue backgrounds need white or pale text to clear AA accessibility thresholds. Most dark blue tones at full saturation pass with white text, but check rather than assume.

In graphic design, dark blue pairs well with white space to avoid a heavy, oppressive feel. The balance between the dark tone and open space is what separates polished from overwhelming. Use contrast intentionally to direct attention, and rely on visual hierarchy to define what matters most on a given layout.

For typography on dark blue backgrounds, sans-serif fonts tend to hold legibility better at small sizes. Leading and tracking both need slight increases compared to light-background text to maintain readability at the same apparent size.

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What Role Does Dark Blue Play in Branding and Marketing?

Dark blue plays a foundational role in branding and marketing, communicating trust, professionalism, and authority to consumers. Marketing research indicates dark blue increases perceived credibility, making it highly effective for financial services, technology, healthcare, and corporate sectors seeking stable, reliable brand perception.

IBM, Samsung, Ford, American Express, and HP all lean on deep blue as the primary brand color. That’s not a coincidence. Blue has been reported by the Pantone Color Institute as the most widely used color in global branding.

It does have limits, though. In food branding, dark blue can suppress appetite associations (which is why it’s rare on fast food packaging). And when every competitor in a category uses blue, the differentiation argument weakens. Worth considering before defaulting to it.

When building a logo around dark blue, apply logo design principles that account for single-color reproduction. At very small sizes, highly saturated dark blue can blend with black, so check print and embroidery outputs early. Good brand guidelines will specify exact Pantone, RGB, and CMYK values to prevent color drift across vendors.

A solid brand style guide should include the approved dark blue values alongside acceptable pairing colors, minimum contrast ratios for backgrounds, and tone-of-voice guidance that matches the color’s psychological associations.

FAQ on Dark Blue Color

What is the hex code for dark blue?

The standard dark blue hex code is #00008B.

Its RGB values are (0, 0, 139), CMYK is 100%, 100%, 0%, 45%, and HSL sits at 240 degrees with 100% saturation and 27% lightness. These values apply across digital and print workflows.

What emotions does dark blue evoke?

Dark blue evokes trust, calm, authority, and stability.

Color psychology research consistently links deep blue tones to professionalism and reliability. It can also suggest introspection or, when overused without contrast, a sense of coldness or emotional distance.

What colors go well with dark blue?

Orange is the direct complementary color to dark blue, creating maximum contrast.

Gold, white, cream, coral, and emerald green also pair well. For softer results, try pairing dark blue with silver or warm gray. Each combination shifts the mood from bold to refined.

What is the difference between dark blue and navy blue?

Navy blue (#000080) is slightly darker, with a blue channel of 128 versus 139 for dark blue.

The difference is subtle on screen but more noticeable in print and fabric. Navy carries stronger military and formal associations, while dark blue reads as a slightly more versatile tone.

What does dark blue mean in branding?

In branding, dark blue communicates trust, credibility, and professionalism.

It is the most widely used color in corporate identity globally. Financial institutions, tech companies, and healthcare brands favor it precisely because it signals competence without aggression. IBM, Samsung, and Ford all rely on deep blue as a core brand color.

How do you make dark blue paint?

Mix ultramarine blue with a small amount of black, roughly 10 parts blue to 1 part black.

For a richer result, combine ultramarine with Prussian blue before adding black. In watercolor, phthalo blue layered repeatedly achieves deep saturation without black muddying the tone.

Is dark blue a warm or cool color?

Dark blue is a cool color, sitting at 240 degrees on the color wheel with no red or yellow influence.

It contrasts with warm tones like orange, red, and gold. This cool classification makes it useful for creating calm, focused environments in both interior design and digital interfaces.

What shades are considered dark blue?

Navy blue, midnight blue, Oxford blue, Prussian blue, cobalt blue, and indigo all fall within the dark blue family.

Each varies in hue angle, saturation, or lightness. Midnight blue leans warmer due to slight red in its mix. Indigo shifts toward purple. Navy sits just below dark blue in brightness.

How is dark blue used in interior design?

Dark blue works on feature walls, kitchen cabinets, upholstered furniture, and textiles.

It performs well in low-light rooms, where it adds depth rather than fighting the space. Pair it with brass, warm wood, or cream to prevent it reading as cold. It suits contemporary, coastal, and traditional styles equally.

What is the CMYK value for dark blue?

The CMYK value for dark blue (#00008B) is approximately C:100, M:100, Y:0, K:45.

These are calculated values from the hex code. Actual print results vary by paper stock and ink density. Coated paper reproduces dark blue most accurately. The closest Pantone match is PMS 2758 C.

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Conclusion

This conclusion is for an article presenting dark blue color as one of the most versatile and purposeful tones across design disciplines.

From its precise hex value of #00008B to its CMYK and HSL specifications, every technical detail covered here supports accurate, consistent color reproduction in both digital and print contexts.

Its deep navy and midnight blue shades carry real psychological weight, communicating stability and credibility wherever they appear.

Whether you are building a dark blue color scheme for a brand identity, mixing cobalt and Prussian blue pigments on canvas, or choosing an indigo accent wall, the decisions you make with this color are rarely neutral.

Used well, it grounds everything around it.

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Bogdan Sandu

Bogdan Sandu is a seasoned designer who has been designing websites since 2008.

Renowned for his expertise in logo design and visual branding, Bogdan has developed a multitude of logos for various clients.

His skills extend to creating posters, vector illustrations, business cards, and brochures. Additionally, Bogdan's UI kits were featured on marketplaces like Visual Hierarchy and UI8.

He also wrote in the past years on sites like Design Your Way, WebDesignerDepot, WPDean, Designmodo, Speckyboy, Slider Revolution, and more.

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