What color is #21090E?

#21090E is a very dark red. In RGB it is rgb(33, 9, 14), and in HSL hsl(348, 57%, 8%).

Is #21090E accessible as text?

On white, #21090E has a contrast ratio of 18.92:1 (passes WCAG AA for body text); on black it is 1.11:1 (fails). For text placed on #21090E, use white for the best readability.

What is the closest Tailwind color to #21090E?

The nearest Tailwind CSS token is mauve-900 (#1D161E).

What colors go well with #21090E?

#21090E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #09201B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #21090E below.

Is #21090E good for buttons?

#21090E works well for buttons and highlights, but use white text on #21090E — black text only reaches 1.11:1, below the 4.5:1 needed for normal-size labels.

Is #21090E the same as CSS black?

No — #21090E is not the CSS named color black, but black (#000000) is the closest CSS named color.

#21090E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #21090E

Not just a swatch — here's how #21090E works with other colors. Named schemes with #21090E in its natural role, and a note on why the supporting colors balance it.

Vintage Leather Lead · 5 colors

Lead #21090E Secondary #7C4829 Surface #EBD9C1 Accent #444F39 Anchor #5A2230

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.

Warm Autumn Interior Dominant · 5 colors

Dominant #21090E Secondary #B8622A Accent #7A7642 Surface #F5EBDD Anchor #3C2A21

This palette keeps Jet Black as the dominant warm neutral, balanced by muted terracotta and olive earth tones and grounded by a deep espresso anchor.

Japanese Sand Base · 5 colors

Base #21090E Surface #F0E8DC Highlight #F7F1E7 Secondary #BBAEA0 Ink #2B2723

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 #21090E Anchor #141210 Accent #D39D4F Secondary #322527 Surface #F3EDE3

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 #21090E Secondary #3A3032 Support #9B9087 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.

Build a working theme in the generator →

Color Lab

How #21090E 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 59/100

Neutral

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

Softness 20/100

Very low

Firm and assertive — carries weight and contrast.

Depth 78/100

High

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

Naturalness 26/100

Low

Loosely natural — an earthy edge without being rustic.

Vintage feel 32/100

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 8/100

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 95/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #21090E

For UI

For branding

For interior

For fashion

People also use #21090E with

Deep Purple Graphite Gainsboro Taupe

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 18.9:1. Use

Subtle surface Use #E3BDC5 for cards and hover fills. Tint 80

Avoid beside #200C09 — 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 #21090E 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: #21090E;
  --color-base-rgb: 33 9 14;
  --color-base-oklch: oklch(18.2% 0.042 9.1);
  --color-50: #FCF3F4;
  --color-100: #F7DEE3;
  --color-200: #EDBFC8;
  --color-300: #DC93A2;
  --color-400: #C86A7D;
  --color-500: #AD485C;
  --color-600: #843D4C;
  --color-700: #5E303A;
  --color-800: #3E2328;
  --color-900: #26171A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#FCF3F4',
    100: '#F7DEE3',
    200: '#EDBFC8',
    300: '#DC93A2',
    400: '#C86A7D',
    500: '#AD485C',
    600: '#843D4C',
    700: '#5E303A',
    800: '#3E2328',
    900: '#26171A',
  },
}

$base: #21090E;
$base-ink: #FFFFFF;
$base-50: #FCF3F4;
$base-100: #F7DEE3;
$base-200: #EDBFC8;
$base-300: #DC93A2;
$base-400: #C86A7D;
$base-500: #AD485C;
$base-600: #843D4C;
$base-700: #5E303A;
$base-800: #3E2328;
$base-900: #26171A;
$base-hover: #1A070B;
$base-subtle: #D79AA6;

{
    "color": {
        "base": {
            "value": "#21090E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#FCF3F4",
                "type": "color"
            },
            "100": {
                "value": "#F7DEE3",
                "type": "color"
            },
            "200": {
                "value": "#EDBFC8",
                "type": "color"
            },
            "300": {
                "value": "#DC93A2",
                "type": "color"
            },
            "400": {
                "value": "#C86A7D",
                "type": "color"
            },
            "500": {
                "value": "#AD485C",
                "type": "color"
            },
            "600": {
                "value": "#843D4C",
                "type": "color"
            },
            "700": {
                "value": "#5E303A",
                "type": "color"
            },
            "800": {
                "value": "#3E2328",
                "type": "color"
            },
            "900": {
                "value": "#26171A",
                "type": "color"
            }
        }
    }
}

Palettes built on #21090E

Color Lab

Pairs with #21090E

UI roles & guardrails

In real applications

Scales

Every model

Export