What color is #203643?

#203643 is a dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(32, 54, 67), and in HSL hsl(202, 35%, 19%).

Is #203643 accessible as text?

On white, #203643 has a contrast ratio of 12.57:1 (passes WCAG AA for body text); on black it is 1.67:1 (fails). For text placed on #203643, use white for the best readability.

What is the closest Tailwind color to #203643?

The nearest Tailwind CSS token is slate-800 (#1D293D).

What colors go well with #203643?

As a neutral, #203643 pairs cleanly with white, off-white and light grays for text, and sits under accent hues like blue, violet, emerald or warm orange — use it as a dark surface or high-contrast base and let the accent carry the color.

Is #203643 the same as CSS darkslategray?

No — #203643 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color by perceptual color distance — it sits in a different color family, so treat it as a rough reference, not a match.

#203643 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #203643

Not just a swatch — here's how #203643 works with other colors. Named schemes with #203643 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #203643 Accent #A6C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Gunmetal Gray 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 #203643 Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Gunmetal Gray 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 #203643 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #415662

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

Vintage Leather Lead · 5 colors

Lead #203643 Secondary #6E5216 Surface #E2DCC0 Accent #385245 Anchor #57233D

Gunmetal Gray 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 #203643 Secondary #52595E Support #969386 Ink #16140F

Gunmetal Gray 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 Gunmetal Gray carrying the quiet middle.

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Color Lab

How #203643 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 39/100

Neutral

Balanced temperature — flexible, sits between warm and cool schemes.

Softness 33/100

Low

Middle-weight — neither delicate nor heavy.

Depth 64/100

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 28/100

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 14/100

Very low

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

UI accent fit 30/100

Low

Workable accent with care around contrast.

Surface fit 53/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 91/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #203643

For UI

For branding

For interior

For fashion

People also use #203643 with

Hunter Green Russian Violet 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 12.6:1. Use

Subtle surface Use #CBD8E0 for cards and hover fills. Tint 80

Avoid beside #1F2A41 — 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 #203643 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: #203643;
  --color-base-rgb: 32 54 67;
  --color-base-oklch: oklch(32.1% 0.036 235.5);
  --color-50: #F4F8FA;
  --color-100: #E3EDF2;
  --color-200: #C8DAE4;
  --color-300: #A1BECE;
  --color-400: #7CA1B6;
  --color-500: #5C8399;
  --color-600: #4B6777;
  --color-700: #394B56;
  --color-800: #283339;
  --color-900: #1A2023;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F4F8FA',
    100: '#E3EDF2',
    200: '#C8DAE4',
    300: '#A1BECE',
    400: '#7CA1B6',
    500: '#5C8399',
    600: '#4B6777',
    700: '#394B56',
    800: '#283339',
    900: '#1A2023',
  },
}

$base: #203643;
$base-ink: #FFFFFF;
$base-50: #F4F8FA;
$base-100: #E3EDF2;
$base-200: #C8DAE4;
$base-300: #A1BECE;
$base-400: #7CA1B6;
$base-500: #5C8399;
$base-600: #4B6777;
$base-700: #394B56;
$base-800: #283339;
$base-900: #1A2023;
$base-hover: #192A34;
$base-subtle: #B1C5D2;

{
    "color": {
        "base": {
            "value": "#203643",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F8FA",
                "type": "color"
            },
            "100": {
                "value": "#E3EDF2",
                "type": "color"
            },
            "200": {
                "value": "#C8DAE4",
                "type": "color"
            },
            "300": {
                "value": "#A1BECE",
                "type": "color"
            },
            "400": {
                "value": "#7CA1B6",
                "type": "color"
            },
            "500": {
                "value": "#5C8399",
                "type": "color"
            },
            "600": {
                "value": "#4B6777",
                "type": "color"
            },
            "700": {
                "value": "#394B56",
                "type": "color"
            },
            "800": {
                "value": "#283339",
                "type": "color"
            },
            "900": {
                "value": "#1A2023",
                "type": "color"
            }
        }
    }
}