What color is #03421F?

#03421F is a very dark, vivid teal-green. In RGB it is rgb(3, 66, 31), and in HSL hsl(147, 91%, 14%).

Is #03421F accessible as text?

On white, #03421F has a contrast ratio of 11.65:1 (passes WCAG AA for body text); on black it is 1.80:1 (fails). For text placed on #03421F, use white for the best readability.

What is the closest Tailwind color to #03421F?

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

What colors go well with #03421F?

#03421F pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #440327. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #03421F below.

Is #03421F good for buttons?

#03421F works well for buttons and highlights, but use white text on #03421F — black text only reaches 1.80:1, below the 4.5:1 needed for normal-size labels.

Is #03421F the same as CSS darkslategray?

No — #03421F 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.

#03421F Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #03421F

Not just a swatch — here's how #03421F works with other colors. Named schemes with #03421F in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #03421F Secondary #4B6C3C Accent #AC6C00 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 #03421F Secondary #754E1B Surface #E5DBC0 Accent #3C5140 Anchor #5B2321

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 #03421F Surface #EEEADC Highlight #F5F1E7 Secondary #B6B09F Ink #2A2723

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 #03421F Anchor #141210 Accent #BFA74B Secondary #222C24 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 #03421F Secondary #506154 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 #03421F 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 45/100

Neutral

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

Softness 31/100

Low

Firm and assertive — carries weight and contrast.

Depth 66/100

High

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

Naturalness 91/100

Very high

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

Vintage feel 50/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 70/100

High

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

Brand distinctiveness 33/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 45/100

Moderate

Workable accent with care around contrast.

Surface fit 38/100

Low

Usable as a tinted surface in measured doses.

Print safety 82/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #03421F

For UI

For branding

For interior

For fashion

People also use #03421F with

Dark Green Bottle Green Deep Purple Platinum Hunter Green

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 11.6:1. Use

Subtle surface Use #B6F0D0 for cards and hover fills. Tint 80

Avoid beside #034436 — 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 #03421F at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #03421F;
  --color-base-rgb: 3 66 31;
  --color-base-oklch: oklch(33.3% 0.085 152.3);
  --color-50: #F0FEF7;
  --color-100: #D8FDE9;
  --color-200: #B1FBD3;
  --color-300: #7DF2B2;
  --color-400: #4EE491;
  --color-500: #2ACB72;
  --color-600: #289A5B;
  --color-700: #236C44;
  --color-800: #1B462E;
  --color-900: #122B1D;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  british-racing-green: {
    50: '#F0FEF7',
    100: '#D8FDE9',
    200: '#B1FBD3',
    300: '#7DF2B2',
    400: '#4EE491',
    500: '#2ACB72',
    600: '#289A5B',
    700: '#236C44',
    800: '#1B462E',
    900: '#122B1D',
  },
}

$base: #03421F;
$base-ink: #FFFFFF;
$base-50: #F0FEF7;
$base-100: #D8FDE9;
$base-200: #B1FBD3;
$base-300: #7DF2B2;
$base-400: #4EE491;
$base-500: #2ACB72;
$base-600: #289A5B;
$base-700: #236C44;
$base-800: #1B462E;
$base-900: #122B1D;
$base-hover: #03371A;
$base-subtle: #90EBB9;

{
    "color": {
        "base": {
            "value": "#03421F",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FEF7",
                "type": "color"
            },
            "100": {
                "value": "#D8FDE9",
                "type": "color"
            },
            "200": {
                "value": "#B1FBD3",
                "type": "color"
            },
            "300": {
                "value": "#7DF2B2",
                "type": "color"
            },
            "400": {
                "value": "#4EE491",
                "type": "color"
            },
            "500": {
                "value": "#2ACB72",
                "type": "color"
            },
            "600": {
                "value": "#289A5B",
                "type": "color"
            },
            "700": {
                "value": "#236C44",
                "type": "color"
            },
            "800": {
                "value": "#1B462E",
                "type": "color"
            },
            "900": {
                "value": "#122B1D",
                "type": "color"
            }
        }
    }
}