What color is #03375C?

#03375C is a dark, vivid cyan-blue. In RGB it is rgb(3, 55, 92), and in HSL hsl(205, 94%, 19%).

Is #03375C accessible as text?

On white, #03375C has a contrast ratio of 12.32:1 (passes WCAG AA for body text); on black it is 1.70:1 (fails). For text placed on #03375C, use white for the best readability.

What is the closest Tailwind color to #03375C?

The nearest Tailwind CSS token is sky-950 (#052F4A).

What colors go well with #03375C?

#03375C pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #5E2903. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #03375C below.

Is #03375C good for buttons?

#03375C works well for buttons and highlights, but use white text on #03375C — black text only reaches 1.70:1, below the 4.5:1 needed for normal-size labels.

Is #03375C the same as CSS midnightblue?

No — #03375C is not the CSS named color midnightblue, but midnightblue (#191970) is the closest CSS named color.

#03375C Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #03375C

Not just a swatch — here's how #03375C works with other colors. Named schemes with #03375C in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #03375C Accent #A5C4C0 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Prussian Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Nordic Calm Accent · 5 colors

Accent #03375C Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Prussian Blue keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Tech Product Signal · 5 colors

Signal #03375C Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #2F587B

Prussian Blue is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Prussian Blue.

Vintage Leather Lead · 5 colors

Lead #03375C Secondary #7F4438 Surface #E1DDC0 Accent #375245 Anchor #57233C

Prussian Blue plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #03375C Secondary #4D5C6A Support #969386 Ink #16140F

Prussian Blue is the single accent in this high-contrast editorial system — set on near-white paper against near-black ink, with a warm grey and a desaturated tint of Prussian Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #03375C actually behaves in design work — read from its OKLCH lightness, chroma and hue, not just its raw numbers. Ten signals to help you decide where this color earns its place.

Warmth 26/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 30/100

Low

Firm and assertive — carries weight and contrast.

Depth 66/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 39/100

Low

A faint retro warmth without tipping into sepia.

Luxury 70/100

High

Restrained and premium — deep, quiet, high-end packaging and fashion.

Brand distinctiveness 32/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 43/100

Moderate

Workable accent with care around contrast.

Surface fit 39/100

Low

Usable as a tinted surface in measured doses.

Print safety 81/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #03375C

For UI

For branding

For interior

For fashion

People also use #03375C with

Teal Green Navy Espresso Gainsboro Charcoal

UI roles & guardrails

Primary action Safe as a filled button with white label. AAA

Body text Passes on white at 16px and above. Pass

Large display Fine for headings 24px+ on white. Pass

Background Pair with white text at 12.3:1. Use

Subtle surface Use #BADAF2 for cards and hover fills. Tint 80

Avoid beside #031A5E — the hue gap is too small to read as intentional. Clash

In real applications

Not a swatch to memorise — a color to build with. Here is #03375C at work across the surfaces designers actually ship.

Website / UI

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Dashboard

Revenue

$48.2k ▲ 12%

Brand

AVELINE

Studio

Poster

Nov 14 · 8PM

NIGHT
MARKET

Packaging

BLOOM

Botanical Wash

250 ml

Interior

Every model

Export

:root {
  --color-base: #03375C;
  --color-base-rgb: 3 55 92;
  --color-base-oklch: oklch(32.7% 0.083 246.6);
  --color-50: #F0F9FE;
  --color-100: #D8EEFD;
  --color-200: #B1DCFC;
  --color-300: #7BC2F4;
  --color-400: #4BA6E7;
  --color-500: #2888CD;
  --color-600: #266B9B;
  --color-700: #214E6D;
  --color-800: #1A3447;
  --color-900: #12212B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  prussian-blue: {
    50: '#F0F9FE',
    100: '#D8EEFD',
    200: '#B1DCFC',
    300: '#7BC2F4',
    400: '#4BA6E7',
    500: '#2888CD',
    600: '#266B9B',
    700: '#214E6D',
    800: '#1A3447',
    900: '#12212B',
  },
}

$base: #03375C;
$base-ink: #FFFFFF;
$base-50: #F0F9FE;
$base-100: #D8EEFD;
$base-200: #B1DCFC;
$base-300: #7BC2F4;
$base-400: #4BA6E7;
$base-500: #2888CD;
$base-600: #266B9B;
$base-700: #214E6D;
$base-800: #1A3447;
$base-900: #12212B;
$base-hover: #022D4B;
$base-subtle: #95C8ED;

{
    "color": {
        "base": {
            "value": "#03375C",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F9FE",
                "type": "color"
            },
            "100": {
                "value": "#D8EEFD",
                "type": "color"
            },
            "200": {
                "value": "#B1DCFC",
                "type": "color"
            },
            "300": {
                "value": "#7BC2F4",
                "type": "color"
            },
            "400": {
                "value": "#4BA6E7",
                "type": "color"
            },
            "500": {
                "value": "#2888CD",
                "type": "color"
            },
            "600": {
                "value": "#266B9B",
                "type": "color"
            },
            "700": {
                "value": "#214E6D",
                "type": "color"
            },
            "800": {
                "value": "#1A3447",
                "type": "color"
            },
            "900": {
                "value": "#12212B",
                "type": "color"
            }
        }
    }
}