What color is #100304?

#100304 is a very dark low-chroma warm gray with a subtle warm cast. In RGB it is rgb(16, 3, 4), and in HSL hsl(355, 68%, 4%).

Is #100304 accessible as text?

On white, #100304 has a contrast ratio of 20.25:1 (passes WCAG AA for body text); on black it is 1.04:1 (fails). For text placed on #100304, use white for the best readability.

What is the closest Tailwind color to #100304?

The nearest Tailwind CSS token is zinc-950 (#09090B).

What colors go well with #100304?

As a neutral, #100304 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 #100304 the same as CSS black?

No — #100304 is not the CSS named color black, but black (#000000) is the closest CSS named color.

#100304 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #100304

Not just a swatch — here's how #100304 works with other colors. Named schemes with #100304 in its natural role, and a note on why the supporting colors balance it.

Vintage Leather Lead · 5 colors

Lead #100304 Secondary #7C4829 Surface #EAD9C0 Accent #434F3A Anchor #5A222F

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 #100304 Secondary #B86229 Accent #797742 Surface #F5EBDD 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 #100304 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 #100304 Anchor #141210 Accent #D29D4E Secondary #322526 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 #100304 Secondary #2A2424 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 #100304 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 57/100

Neutral

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

Softness 15/100

Very low

Firm and assertive — carries weight and contrast.

Depth 82/100

Very 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 24/100

Low

Clean and current — no dusty, aged cast.

Luxury 81/100

Very high

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

Brand distinctiveness 11/100

Very low

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

UI accent fit 4/100

Very low

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

Surface fit 68/100

High

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

Print safety 97/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #100304

For UI

For branding

For interior

For fashion

People also use #100304 with

Deep Purple Jet Black 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 20.3:1. Use

Subtle surface Use #E6B6BA for cards and hover fills. Tint 80

Avoid beside #110703 — 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 #100304 at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #100304;
  --color-base-rgb: 16 3 4;
  --color-base-oklch: oklch(12.6% 0.029 14.9);
  --color-50: #FDF2F3;
  --color-100: #F9DCDE;
  --color-200: #F2BBBF;
  --color-300: #E38C93;
  --color-400: #D1616A;
  --color-500: #B63F49;
  --color-600: #8B373E;
  --color-700: #632C31;
  --color-800: #412023;
  --color-900: #281517;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#FDF2F3',
    100: '#F9DCDE',
    200: '#F2BBBF',
    300: '#E38C93',
    400: '#D1616A',
    500: '#B63F49',
    600: '#8B373E',
    700: '#632C31',
    800: '#412023',
    900: '#281517',
  },
}

$base: #100304;
$base-ink: #FFFFFF;
$base-50: #FDF2F3;
$base-100: #F9DCDE;
$base-200: #F2BBBF;
$base-300: #E38C93;
$base-400: #D1616A;
$base-500: #B63F49;
$base-600: #8B373E;
$base-700: #632C31;
$base-800: #412023;
$base-900: #281517;
$base-hover: #0E0304;
$base-subtle: #DC9096;

{
    "color": {
        "base": {
            "value": "#100304",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#FDF2F3",
                "type": "color"
            },
            "100": {
                "value": "#F9DCDE",
                "type": "color"
            },
            "200": {
                "value": "#F2BBBF",
                "type": "color"
            },
            "300": {
                "value": "#E38C93",
                "type": "color"
            },
            "400": {
                "value": "#D1616A",
                "type": "color"
            },
            "500": {
                "value": "#B63F49",
                "type": "color"
            },
            "600": {
                "value": "#8B373E",
                "type": "color"
            },
            "700": {
                "value": "#632C31",
                "type": "color"
            },
            "800": {
                "value": "#412023",
                "type": "color"
            },
            "900": {
                "value": "#281517",
                "type": "color"
            }
        }
    }
}

Palettes built on #100304

Color Lab

Pairs with #100304

UI roles & guardrails

In real applications

Scales

Every model

Export