What color is #203A3C?

#203A3C is a dark low-chroma cool gray with a subtle cool cast. In RGB it is rgb(32, 58, 60), and in HSL hsl(184, 30%, 18%).

Is #203A3C accessible as text?

On white, #203A3C has a contrast ratio of 12.13:1 (passes WCAG AA for body text); on black it is 1.73:1 (fails). For text placed on #203A3C, use white for the best readability.

What is the closest Tailwind color to #203A3C?

The nearest Tailwind CSS token is zinc-700 (#3F3F46).

What colors go well with #203A3C?

As a neutral, #203A3C 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 #203A3C the same as CSS darkslategray?

No — #203A3C 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.

#203A3C Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #203A3C

Not just a swatch — here's how #203A3C works with other colors. Named schemes with #203A3C in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #203A3C Accent #A6C4BE Surface #DFDABE Secondary #9AA0A0 Anchor #1D3549

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 #203A3C Secondary #AEB4B8 Surface #F1F2F0 Support #7A94A5 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 #203A3C Surface #14161A Highlight #F4F6F8 Secondary #596771 Accent #425A5C

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 #203A3C Secondary #715017 Surface #E3DCC0 Accent #395143 Anchor #552340

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 #203A3C Secondary #535C5D Support #979286 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 #203A3C 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 42/100

Neutral

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

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 4/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 29/100

Low

A faint retro warmth without tipping into sepia.

Luxury 66/100

High

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

Brand distinctiveness 12/100

Very low

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

UI accent fit 31/100

Low

Workable accent with care around contrast.

Surface fit 54/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 92/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #203A3C

For UI

For branding

For interior

For fashion

People also use #203A3C with

Hunter Green Gunmetal Gray Bistre Platinum Dark Slate Gray

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 12.1:1. Use

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

Avoid beside #20313C — 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 #203A3C 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: #203A3C;
  --color-base-rgb: 32 58 60;
  --color-base-oklch: oklch(32.8% 0.032 202.0);
  --color-50: #F5FAFA;
  --color-100: #E4F0F1;
  --color-200: #CAE1E2;
  --color-300: #A4C8CB;
  --color-400: #80AFB2;
  --color-500: #609195;
  --color-600: #4E7174;
  --color-700: #3B5254;
  --color-800: #293738;
  --color-900: #1B2223;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F5FAFA',
    100: '#E4F0F1',
    200: '#CAE1E2',
    300: '#A4C8CB',
    400: '#80AFB2',
    500: '#609195',
    600: '#4E7174',
    700: '#3B5254',
    800: '#293738',
    900: '#1B2223',
  },
}

$base: #203A3C;
$base-ink: #FFFFFF;
$base-50: #F5FAFA;
$base-100: #E4F0F1;
$base-200: #CAE1E2;
$base-300: #A4C8CB;
$base-400: #80AFB2;
$base-500: #609195;
$base-600: #4E7174;
$base-700: #3B5254;
$base-800: #293738;
$base-900: #1B2223;
$base-hover: #1A2E30;
$base-subtle: #B2CDCF;

{
    "color": {
        "base": {
            "value": "#203A3C",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5FAFA",
                "type": "color"
            },
            "100": {
                "value": "#E4F0F1",
                "type": "color"
            },
            "200": {
                "value": "#CAE1E2",
                "type": "color"
            },
            "300": {
                "value": "#A4C8CB",
                "type": "color"
            },
            "400": {
                "value": "#80AFB2",
                "type": "color"
            },
            "500": {
                "value": "#609195",
                "type": "color"
            },
            "600": {
                "value": "#4E7174",
                "type": "color"
            },
            "700": {
                "value": "#3B5254",
                "type": "color"
            },
            "800": {
                "value": "#293738",
                "type": "color"
            },
            "900": {
                "value": "#1B2223",
                "type": "color"
            }
        }
    }
}