What color is #031809?

#031809 is a very dark, vivid green. In RGB it is rgb(3, 24, 9), and in HSL hsl(137, 78%, 5%).

Is #031809 accessible as text?

On white, #031809 has a contrast ratio of 18.45:1 (passes WCAG AA for body text); on black it is 1.14:1 (fails). For text placed on #031809, use white for the best readability.

What is the closest Tailwind color to #031809?

The nearest Tailwind CSS token is olive-950 (#0C0C09).

What colors go well with #031809?

#031809 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #170311. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #031809 below.

Is #031809 good for buttons?

#031809 works well for buttons and highlights, but use white text on #031809 — black text only reaches 1.14:1, below the 4.5:1 needed for normal-size labels.

Is #031809 the same as CSS black?

No — #031809 is not the CSS named color black, but black (#000000) is the closest CSS named color.

#031809 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #031809

Not just a swatch — here's how #031809 works with other colors. Named schemes with #031809 in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #031809 Secondary #4B6C3C Accent #AD6C00 Surface #EEEAD6 Anchor #3C2F20

Jet Black 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 #031809 Secondary #754E1B Surface #E5DBC0 Accent #3C5140 Anchor #5B2321

Jet Black 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 #031809 Surface #EEEADC Highlight #F5F1E7 Secondary #B6B09F Ink #2A2723

Jet Black 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 #031809 Anchor #141210 Accent #BFA74B Secondary #222C24 Surface #F1EDE3

Jet Black 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 #031809 Secondary #2F3731 Support #989286 Ink #17140F

Jet Black 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 Jet Black carrying the quiet middle.

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Color Lab

How #031809 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 47/100

Neutral

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

Softness 20/100

Low

Firm and assertive — carries weight and contrast.

Depth 77/100

High

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

Naturalness 51/100

Moderate

Loosely natural — an earthy edge without being rustic.

Vintage feel 26/100

Low

A faint retro warmth without tipping into sepia.

Luxury 78/100

High

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

Brand distinctiveness 16/100

Very low

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

UI accent fit 9/100

Very low

Weak as an action color — too pale, too dark or too muted to signal.

Surface fit 60/100

High

Calm enough for large fills — backgrounds, cards, sections.

Print safety 91/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #031809

For UI

For branding

For interior

For fashion

People also use #031809 with

British Racing Green Jet Black 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 18.4:1. Use

Subtle surface Use #B3EAC3 for cards and hover fills. Tint 80

Avoid beside #03170F — 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 #031809 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: #031809;
  --color-base-rgb: 3 24 9;
  --color-base-oklch: oklch(18.6% 0.042 151.7);
  --color-50: #F1FEF5;
  --color-100: #DAFBE3;
  --color-200: #B6F6C8;
  --color-300: #85EAA2;
  --color-400: #58DA7D;
  --color-500: #36BF5D;
  --color-600: #30914C;
  --color-700: #28673A;
  --color-800: #1E4328;
  --color-900: #14291A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F1FEF5',
    100: '#DAFBE3',
    200: '#B6F6C8',
    300: '#85EAA2',
    400: '#58DA7D',
    500: '#36BF5D',
    600: '#30914C',
    700: '#28673A',
    800: '#1E4328',
    900: '#14291A',
  },
}

$base: #031809;
$base-ink: #FFFFFF;
$base-50: #F1FEF5;
$base-100: #DAFBE3;
$base-200: #B6F6C8;
$base-300: #85EAA2;
$base-400: #58DA7D;
$base-500: #36BF5D;
$base-600: #30914C;
$base-700: #28673A;
$base-800: #1E4328;
$base-900: #14291A;
$base-hover: #021207;
$base-subtle: #8BE1A4;

{
    "color": {
        "base": {
            "value": "#031809",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1FEF5",
                "type": "color"
            },
            "100": {
                "value": "#DAFBE3",
                "type": "color"
            },
            "200": {
                "value": "#B6F6C8",
                "type": "color"
            },
            "300": {
                "value": "#85EAA2",
                "type": "color"
            },
            "400": {
                "value": "#58DA7D",
                "type": "color"
            },
            "500": {
                "value": "#36BF5D",
                "type": "color"
            },
            "600": {
                "value": "#30914C",
                "type": "color"
            },
            "700": {
                "value": "#28673A",
                "type": "color"
            },
            "800": {
                "value": "#1E4328",
                "type": "color"
            },
            "900": {
                "value": "#14291A",
                "type": "color"
            }
        }
    }
}

Palettes built on #031809

Color Lab

Pairs with #031809

UI roles & guardrails

In real applications

Scales

Every model

Export