What color is #02100B?

#02100B is a very dark low-chroma cool gray with a subtle cool cast. In RGB it is rgb(2, 16, 11), and in HSL hsl(159, 78%, 4%).

Is #02100B accessible as text?

On white, #02100B has a contrast ratio of 19.42:1 (passes WCAG AA for body text); on black it is 1.08:1 (fails). For text placed on #02100B, use white for the best readability.

What is the closest Tailwind color to #02100B?

The nearest Tailwind CSS token is neutral-950 (#0A0A0A).

What colors go well with #02100B?

As a neutral, #02100B pairs cleanly with white, off-white and light grays for text, and sits under accent hues like blue, violet, emerald or warm orange — use it as a dark surface or high-contrast base and let the accent carry the color.

Is #02100B the same as CSS black?

No — #02100B is not the CSS named color black, but black (#000000) is the closest CSS named color.

#02100B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #02100B

Not just a swatch — here's how #02100B works with other colors. Named schemes with #02100B in its natural role, and a note on why the supporting colors balance it.

Vintage Leather Lead · 5 colors

Lead #02100B Secondary #734F19 Surface #E5DBC0 Accent #3B5141 Anchor #5B231F

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 #02100B Surface #EDEADC Highlight #F5F1E7 Secondary #B5B19F 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 #02100B Anchor #141210 Accent #BCA84C Secondary #1F2C27 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.

Moody Editorial Color · 5 colors

Color #02100B Anchor #292A2E Secondary #6C6F74 Surface #EBE7DA Accent #000000

Jet Black adds the colour to this moody editorial scheme — charcoal and a mid-grey around it, a bone highlight, and a muted jewel accent drawn from Jet Black.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #02100B Secondary #292E2C Support #989286 Ink #16140F

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 #02100B 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 46/100

Neutral

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

Softness 18/100

Very low

Firm and assertive — carries weight and contrast.

Depth 79/100

High

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

Naturalness 20/100

Low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 19/100

Very low

Clean and current — no dusty, aged cast.

Luxury 78/100

High

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

Brand distinctiveness 10/100

Very low

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

UI accent fit 5/100

Very low

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

Surface fit 67/100

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 #02100B

For UI

For branding

For interior

For fashion

People also use #02100B with

Sacramento Green Jet Black Platinum Dark Slate Gray

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 19.4:1. Use

Subtle surface Use #B3EAD6 for cards and hover fills. Tint 80

Avoid beside #021212 — 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 #02100B 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
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Packaging

BLOOM

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250 ml

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Export

:root {
  --color-base: #02100B;
  --color-base-rgb: 2 16 11;
  --color-base-oklch: oklch(15.7% 0.026 170.9);
  --color-50: #F1FEF9;
  --color-100: #DAFBF0;
  --color-200: #B6F6E0;
  --color-300: #85EAC7;
  --color-400: #58DAAC;
  --color-500: #36BF8F;
  --color-600: #30916F;
  --color-700: #286751;
  --color-800: #1E4336;
  --color-900: #142922;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F1FEF9',
    100: '#DAFBF0',
    200: '#B6F6E0',
    300: '#85EAC7',
    400: '#58DAAC',
    500: '#36BF8F',
    600: '#30916F',
    700: '#286751',
    800: '#1E4336',
    900: '#142922',
  },
}

$base: #02100B;
$base-ink: #FFFFFF;
$base-50: #F1FEF9;
$base-100: #DAFBF0;
$base-200: #B6F6E0;
$base-300: #85EAC7;
$base-400: #58DAAC;
$base-500: #36BF8F;
$base-600: #30916F;
$base-700: #286751;
$base-800: #1E4336;
$base-900: #142922;
$base-hover: #020F0A;
$base-subtle: #8AE1C3;

{
    "color": {
        "base": {
            "value": "#02100B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1FEF9",
                "type": "color"
            },
            "100": {
                "value": "#DAFBF0",
                "type": "color"
            },
            "200": {
                "value": "#B6F6E0",
                "type": "color"
            },
            "300": {
                "value": "#85EAC7",
                "type": "color"
            },
            "400": {
                "value": "#58DAAC",
                "type": "color"
            },
            "500": {
                "value": "#36BF8F",
                "type": "color"
            },
            "600": {
                "value": "#30916F",
                "type": "color"
            },
            "700": {
                "value": "#286751",
                "type": "color"
            },
            "800": {
                "value": "#1E4336",
                "type": "color"
            },
            "900": {
                "value": "#142922",
                "type": "color"
            }
        }
    }
}

Palettes built on #02100B

Color Lab

Pairs with #02100B

UI roles & guardrails

In real applications

Scales

Every model

Export