What color is #03425D?

#03425D is a dark, vivid cyan-blue. In RGB it is rgb(3, 66, 93), and in HSL hsl(198, 94%, 19%).

Is #03425D accessible as text?

On white, #03425D has a contrast ratio of 10.82:1 (passes WCAG AA for body text); on black it is 1.94:1 (fails). For text placed on #03425D, use white for the best readability.

What is the closest Tailwind color to #03425D?

The nearest Tailwind CSS token is sky-900 (#024A70).

What colors go well with #03425D?

#03425D pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #5E1E03. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #03425D below.

Is #03425D good for buttons?

#03425D works well for buttons and highlights, but use white text on #03425D — black text only reaches 1.94:1, below the 4.5:1 needed for normal-size labels.

Is #03425D the same as CSS darkslategray?

No — #03425D is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#03425D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #03425D

Not just a swatch — here's how #03425D works with other colors. Named schemes with #03425D in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #03425D Accent #A6C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Yale 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 #03425D Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Yale 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 #03425D Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #34637D

Yale 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 Yale Blue.

Vintage Leather Lead · 5 colors

Lead #03425D Secondary #6F5216 Surface #E2DCC0 Accent #385244 Anchor #57233D

Yale 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 #03425D Secondary #55656F Support #969386 Ink #16140F

Yale 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 Yale Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #03425D 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 28/100

Cool

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

Softness 34/100

Low

Middle-weight — neither delicate nor heavy.

Depth 63/100

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 67/100

High

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

Brand distinctiveness 28/100

Low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 50/100

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 #03425D

For UI

For branding

For interior

For fashion

People also use #03425D with

Sea Green Navy Bistre Platinum 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 10.8:1. Use

Subtle surface Use #BAE1F2 for cards and hover fills. Tint 80

Avoid beside #03245E — 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 #03425D 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: #03425D;
  --color-base-rgb: 3 66 93;
  --color-base-oklch: oklch(35.8% 0.073 234.3);
  --color-50: #F0FAFE;
  --color-100: #D8F2FD;
  --color-200: #B1E5FC;
  --color-300: #7BD0F4;
  --color-400: #4BB8E7;
  --color-500: #289CCD;
  --color-600: #26789B;
  --color-700: #21576D;
  --color-800: #1A3947;
  --color-900: #12242B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  yale-blue: {
    50: '#F0FAFE',
    100: '#D8F2FD',
    200: '#B1E5FC',
    300: '#7BD0F4',
    400: '#4BB8E7',
    500: '#289CCD',
    600: '#26789B',
    700: '#21576D',
    800: '#1A3947',
    900: '#12242B',
  },
}

$base: #03425D;
$base-ink: #FFFFFF;
$base-50: #F0FAFE;
$base-100: #D8F2FD;
$base-200: #B1E5FC;
$base-300: #7BD0F4;
$base-400: #4BB8E7;
$base-500: #289CCD;
$base-600: #26789B;
$base-700: #21576D;
$base-800: #1A3947;
$base-900: #12242B;
$base-hover: #02354B;
$base-subtle: #95D3ED;

{
    "color": {
        "base": {
            "value": "#03425D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FAFE",
                "type": "color"
            },
            "100": {
                "value": "#D8F2FD",
                "type": "color"
            },
            "200": {
                "value": "#B1E5FC",
                "type": "color"
            },
            "300": {
                "value": "#7BD0F4",
                "type": "color"
            },
            "400": {
                "value": "#4BB8E7",
                "type": "color"
            },
            "500": {
                "value": "#289CCD",
                "type": "color"
            },
            "600": {
                "value": "#26789B",
                "type": "color"
            },
            "700": {
                "value": "#21576D",
                "type": "color"
            },
            "800": {
                "value": "#1A3947",
                "type": "color"
            },
            "900": {
                "value": "#12242B",
                "type": "color"
            }
        }
    }
}