What color is #18401B?

#18401B is a very dark green. In RGB it is rgb(24, 64, 27), and in HSL hsl(125, 45%, 17%).

Is #18401B accessible as text?

On white, #18401B has a contrast ratio of 11.74:1 (passes WCAG AA for body text); on black it is 1.79:1 (fails). For text placed on #18401B, use white for the best readability.

What is the closest Tailwind color to #18401B?

The nearest Tailwind CSS token is emerald-900 (#004F3B).

What colors go well with #18401B?

#18401B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #3F183C. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #18401B below.

Is #18401B good for buttons?

#18401B works well for buttons and highlights, but use white text on #18401B — black text only reaches 1.79:1, below the 4.5:1 needed for normal-size labels.

Is #18401B the same as CSS darkslategray?

No — #18401B 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.

#18401B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #18401B

Not just a swatch — here's how #18401B works with other colors. Named schemes with #18401B in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #18401B Secondary #4C6B3B Accent #AD6C00 Surface #EEEAD6 Anchor #3C2F20

British Racing Green leads this botanical set among foliage greens and a terracotta accent, softened by cream and grounded in bark brown.

Vintage Leather Lead · 5 colors

Lead #18401B Secondary #754E1B Surface #E6DBC0 Accent #3C5140 Anchor #5B2322

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

Japanese Sand Base · 5 colors

Base #18401B Surface #EEE9DC Highlight #F5F1E7 Secondary #B6B09F Ink #2B2723

British Racing Green sets a calm, sun-bleached base here, wrapped in bone and paper off-whites and a soft greige, with a single ink accent for wabi-sabi restraint.

Luxury Packaging Feature · 5 colors

Feature #18401B Anchor #141210 Accent #C0A64B Secondary #232C23 Surface #F1EDE3

British Racing Green carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #18401B Secondary #526052 Support #989286 Ink #17140F

British Racing Green 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 British Racing Green carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #18401B 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 48/100

Neutral

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

Softness 31/100

Low

Firm and assertive — carries weight and contrast.

Depth 65/100

High

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

Naturalness 95/100

Very high

Organic, earthy character — at home in wellness, food and craft brands.

Vintage feel 49/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 69/100

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 43/100

Moderate

Workable accent with care around contrast.

Surface fit 40/100

Low

Usable as a tinted surface in measured doses.

Print safety 83/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #18401B

For UI

For branding

For interior

For fashion

People also use #18401B with

Hunter Green Bottle Green Russian Violet Platinum

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 11.7:1. Use

Subtle surface Use #C7E2C9 for cards and hover fills. Tint 80

Avoid beside #183F28 — 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 #18401B 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: #18401B;
  --color-base-rgb: 24 64 27;
  --color-base-oklch: oklch(33.2% 0.077 145.0);
  --color-50: #F4FBF4;
  --color-100: #E1F4E3;
  --color-200: #C4E8C7;
  --color-300: #9BD59F;
  --color-400: #74BE7A;
  --color-500: #53A259;
  --color-600: #457D4A;
  --color-700: #355A38;
  --color-800: #263B27;
  --color-900: #19251A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  british-racing-green: {
    50: '#F4FBF4',
    100: '#E1F4E3',
    200: '#C4E8C7',
    300: '#9BD59F',
    400: '#74BE7A',
    500: '#53A259',
    600: '#457D4A',
    700: '#355A38',
    800: '#263B27',
    900: '#19251A',
  },
}

$base: #18401B;
$base-ink: #FFFFFF;
$base-50: #F4FBF4;
$base-100: #E1F4E3;
$base-200: #C4E8C7;
$base-300: #9BD59F;
$base-400: #74BE7A;
$base-500: #53A259;
$base-600: #457D4A;
$base-700: #355A38;
$base-800: #263B27;
$base-900: #19251A;
$base-hover: #133216;
$base-subtle: #AAD5AD;

{
    "color": {
        "base": {
            "value": "#18401B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4FBF4",
                "type": "color"
            },
            "100": {
                "value": "#E1F4E3",
                "type": "color"
            },
            "200": {
                "value": "#C4E8C7",
                "type": "color"
            },
            "300": {
                "value": "#9BD59F",
                "type": "color"
            },
            "400": {
                "value": "#74BE7A",
                "type": "color"
            },
            "500": {
                "value": "#53A259",
                "type": "color"
            },
            "600": {
                "value": "#457D4A",
                "type": "color"
            },
            "700": {
                "value": "#355A38",
                "type": "color"
            },
            "800": {
                "value": "#263B27",
                "type": "color"
            },
            "900": {
                "value": "#19251A",
                "type": "color"
            }
        }
    }
}