What color is #203D64?

#203D64 is a dark blue. In RGB it is rgb(32, 61, 100), and in HSL hsl(214, 52%, 26%).

Is #203D64 accessible as text?

On white, #203D64 has a contrast ratio of 10.98:1 (passes WCAG AA for body text); on black it is 1.91:1 (fails). For text placed on #203D64, use white for the best readability.

What is the closest Tailwind color to #203D64?

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

What colors go well with #203D64?

#203D64 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #654720. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #203D64 below.

Is #203D64 good for buttons?

#203D64 works well for buttons and highlights, but use white text on #203D64 — black text only reaches 1.91:1, below the 4.5:1 needed for normal-size labels.

Is #203D64 the same as CSS darkslategray?

No — #203D64 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#203D64 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #203D64

Not just a swatch — here's how #203D64 works with other colors. Named schemes with #203D64 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #203D64 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

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 #203D64 Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A6 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 #203D64 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #435E84

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 #203D64 Secondary #7F4537 Surface #E1DDC1 Accent #375246 Anchor #57233B

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 #203D64 Secondary #596472 Support #9D8F89 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 #203D64 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 30/100

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 41/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 67/100

High

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

Brand distinctiveness 30/100

Low

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

UI accent fit 51/100

Moderate

Workable accent with care around contrast.

Surface fit 38/100

Low

Usable as a tinted surface in measured doses.

Print safety 84/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #203D64

For UI

For branding

For interior

For fashion

People also use #203D64 with

Teal Green Midnight Blue Sepia 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 11.0:1. Use

Subtle surface Use #CBD7E7 for cards and hover fills. Tint 80

Avoid beside #202765 — 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 #203D64 at work across the surfaces designers actually ship.

Website / UI

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Build faster.

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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: #203D64;
  --color-base-rgb: 32 61 100;
  --color-base-oklch: oklch(35.8% 0.077 256.4);
  --color-50: #F3F7FC;
  --color-100: #DFE9F6;
  --color-200: #C1D3EB;
  --color-300: #96B3D9;
  --color-400: #6E93C4;
  --color-500: #4D74A8;
  --color-600: #415D81;
  --color-700: #32455C;
  --color-800: #242F3D;
  --color-900: #181E26;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  yale-blue: {
    50: '#F3F7FC',
    100: '#DFE9F6',
    200: '#C1D3EB',
    300: '#96B3D9',
    400: '#6E93C4',
    500: '#4D74A8',
    600: '#415D81',
    700: '#32455C',
    800: '#242F3D',
    900: '#181E26',
  },
}

$base: #203D64;
$base-ink: #FFFFFF;
$base-50: #F3F7FC;
$base-100: #DFE9F6;
$base-200: #C1D3EB;
$base-300: #96B3D9;
$base-400: #6E93C4;
$base-500: #4D74A8;
$base-600: #415D81;
$base-700: #32455C;
$base-800: #242F3D;
$base-900: #181E26;
$base-hover: #193151;
$base-subtle: #B0C3DD;

{
    "color": {
        "base": {
            "value": "#203D64",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F7FC",
                "type": "color"
            },
            "100": {
                "value": "#DFE9F6",
                "type": "color"
            },
            "200": {
                "value": "#C1D3EB",
                "type": "color"
            },
            "300": {
                "value": "#96B3D9",
                "type": "color"
            },
            "400": {
                "value": "#6E93C4",
                "type": "color"
            },
            "500": {
                "value": "#4D74A8",
                "type": "color"
            },
            "600": {
                "value": "#415D81",
                "type": "color"
            },
            "700": {
                "value": "#32455C",
                "type": "color"
            },
            "800": {
                "value": "#242F3D",
                "type": "color"
            },
            "900": {
                "value": "#181E26",
                "type": "color"
            }
        }
    }
}