What color is #031B09?

#031B09 is a very dark, vivid green. In RGB it is rgb(3, 27, 9), and in HSL hsl(135, 80%, 6%).

Is #031B09 accessible as text?

On white, #031B09 has a contrast ratio of 18.03:1 (passes WCAG AA for body text); on black it is 1.16:1 (fails). For text placed on #031B09, use white for the best readability.

What is the closest Tailwind color to #031B09?

The nearest Tailwind CSS token is olive-900 (#1D1D16).

What colors go well with #031B09?

#031B09 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #1C0315. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #031B09 below.

Is #031B09 good for buttons?

#031B09 works well for buttons and highlights, but use white text on #031B09 — black text only reaches 1.16:1, below the 4.5:1 needed for normal-size labels.

Is #031B09 the same as CSS midnightblue?

No — #031B09 is not the CSS named color midnightblue, but midnightblue (#191970) 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.

#031B09 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #031B09

Not just a swatch — here's how #031B09 works with other colors. Named schemes with #031B09 in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #031B09 Secondary #4B6C3C Accent #AD6C00 Surface #EEEAD6 Anchor #3C2F20

Graphite 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 #031B09 Secondary #754E1B Surface #E5DBC0 Accent #3C5140 Anchor #5B2321

Graphite 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 #031B09 Surface #EEEADC Highlight #F5F1E7 Secondary #B6B09F Ink #2B2723

Graphite 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 #031B09 Anchor #141210 Accent #C0A74B Secondary #222C24 Surface #F1EDE3

Graphite 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 #031B09 Secondary #313A33 Support #989286 Ink #17140F

Graphite 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 Graphite carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #031B09 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 21/100

Low

Firm and assertive — carries weight and contrast.

Depth 77/100

High

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

Naturalness 59/100

Moderate

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

Vintage feel 28/100

Low

A faint retro warmth without tipping into sepia.

Luxury 77/100

High

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

Brand distinctiveness 18/100

Very low

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

UI accent fit 10/100

Very low

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

Surface fit 58/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 90/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #031B09

For UI

For branding

For interior

For fashion

People also use #031B09 with

British Racing Green Graphite 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 18.0:1. Use

Subtle surface Use #B3EBC1 for cards and hover fills. Tint 80

Avoid beside #031C11 — 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 #031B09 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: #031B09;
  --color-base-rgb: 3 27 9;
  --color-base-oklch: oklch(19.7% 0.047 149.9);
  --color-50: #F1FEF4;
  --color-100: #D9FCE2;
  --color-200: #B6F7C6;
  --color-300: #84EB9E;
  --color-400: #57DB78;
  --color-500: #34C157;
  --color-600: #2F9348;
  --color-700: #276837;
  --color-800: #1D4427;
  --color-900: #142919;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  graphite: {
    50: '#F1FEF4',
    100: '#D9FCE2',
    200: '#B6F7C6',
    300: '#84EB9E',
    400: '#57DB78',
    500: '#34C157',
    600: '#2F9348',
    700: '#276837',
    800: '#1D4427',
    900: '#142919',
  },
}

$base: #031B09;
$base-ink: #FFFFFF;
$base-50: #F1FEF4;
$base-100: #D9FCE2;
$base-200: #B6F7C6;
$base-300: #84EB9E;
$base-400: #57DB78;
$base-500: #34C157;
$base-600: #2F9348;
$base-700: #276837;
$base-800: #1D4427;
$base-900: #142919;
$base-hover: #021607;
$base-subtle: #8BE3A1;

{
    "color": {
        "base": {
            "value": "#031B09",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1FEF4",
                "type": "color"
            },
            "100": {
                "value": "#D9FCE2",
                "type": "color"
            },
            "200": {
                "value": "#B6F7C6",
                "type": "color"
            },
            "300": {
                "value": "#84EB9E",
                "type": "color"
            },
            "400": {
                "value": "#57DB78",
                "type": "color"
            },
            "500": {
                "value": "#34C157",
                "type": "color"
            },
            "600": {
                "value": "#2F9348",
                "type": "color"
            },
            "700": {
                "value": "#276837",
                "type": "color"
            },
            "800": {
                "value": "#1D4427",
                "type": "color"
            },
            "900": {
                "value": "#142919",
                "type": "color"
            }
        }
    }
}