What color is #210B09?

#210B09 is a very dark red. In RGB it is rgb(33, 11, 9), and in HSL hsl(5, 57%, 8%).

Is #210B09 accessible as text?

On white, #210B09 has a contrast ratio of 18.81:1 (passes WCAG AA for body text); on black it is 1.12:1 (fails). For text placed on #210B09, use white for the best readability.

What is the closest Tailwind color to #210B09?

The nearest Tailwind CSS token is taupe-900 (#1D1816).

What colors go well with #210B09?

#210B09 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #091E20. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #210B09 below.

Is #210B09 good for buttons?

#210B09 works well for buttons and highlights, but use white text on #210B09 — black text only reaches 1.12:1, below the 4.5:1 needed for normal-size labels.

Is #210B09 the same as CSS black?

No — #210B09 is not the CSS named color black, but black (#000000) is the closest CSS named color.

#210B09 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #210B09

Not just a swatch — here's how #210B09 works with other colors. Named schemes with #210B09 in its natural role, and a note on why the supporting colors balance it.

Vintage Leather Lead · 5 colors

Lead #210B09 Secondary #7B4927 Surface #EAD9C0 Accent #43503A Anchor #5A222E

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 #210B09 Secondary #B76326 Accent #787743 Surface #F4EBDD Anchor #3B2A21

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 #210B09 Surface #F0E9DC 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 #210B09 Anchor #141210 Accent #D09E4E Secondary #322524 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 #210B09 Secondary #3B3130 Support #9B9186 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 #210B09 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 61/100

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 45/100

Moderate

Loosely natural — an earthy edge without being rustic.

Vintage feel 32/100

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 15/100

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 61/100

High

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

Print safety 96/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #210B09

For UI

For branding

For interior

For fashion

People also use #210B09 with

Oxblood Graphite Gainsboro Espresso

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 18.8:1. Use

Subtle surface Use #E3C0BD for cards and hover fills. Tint 80

Avoid beside #201209 — 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 #210B09 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: #210B09;
  --color-base-rgb: 33 11 9;
  --color-base-oklch: oklch(18.4% 0.038 26.9);
  --color-50: #FCF3F3;
  --color-100: #F7E0DE;
  --color-200: #EDC3BF;
  --color-300: #DC9993;
  --color-400: #C8726A;
  --color-500: #AD5148;
  --color-600: #84433D;
  --color-700: #5E3430;
  --color-800: #3E2523;
  --color-900: #261817;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#FCF3F3',
    100: '#F7E0DE',
    200: '#EDC3BF',
    300: '#DC9993',
    400: '#C8726A',
    500: '#AD5148',
    600: '#84433D',
    700: '#5E3430',
    800: '#3E2523',
    900: '#261817',
  },
}

$base: #210B09;
$base-ink: #FFFFFF;
$base-50: #FCF3F3;
$base-100: #F7E0DE;
$base-200: #EDC3BF;
$base-300: #DC9993;
$base-400: #C8726A;
$base-500: #AD5148;
$base-600: #84433D;
$base-700: #5E3430;
$base-800: #3E2523;
$base-900: #261817;
$base-hover: #1A0907;
$base-subtle: #D79F9A;

{
    "color": {
        "base": {
            "value": "#210B09",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#FCF3F3",
                "type": "color"
            },
            "100": {
                "value": "#F7E0DE",
                "type": "color"
            },
            "200": {
                "value": "#EDC3BF",
                "type": "color"
            },
            "300": {
                "value": "#DC9993",
                "type": "color"
            },
            "400": {
                "value": "#C8726A",
                "type": "color"
            },
            "500": {
                "value": "#AD5148",
                "type": "color"
            },
            "600": {
                "value": "#84433D",
                "type": "color"
            },
            "700": {
                "value": "#5E3430",
                "type": "color"
            },
            "800": {
                "value": "#3E2523",
                "type": "color"
            },
            "900": {
                "value": "#261817",
                "type": "color"
            }
        }
    }
}

Palettes built on #210B09

Color Lab

Pairs with #210B09

UI roles & guardrails

In real applications

Scales

Every model

Export