What color is #100003?

#100003 is a very dark, vivid red. In RGB it is rgb(16, 0, 3), and in HSL hsl(349, 100%, 3%).

Is #100003 accessible as text?

On white, #100003 has a contrast ratio of 20.52:1 (passes WCAG AA for body text); on black it is 1.02:1 (fails). For text placed on #100003, use white for the best readability.

What is the closest Tailwind color to #100003?

The nearest Tailwind CSS token is mauve-950 (#0C090C).

What colors go well with #100003?

#100003 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #000F0C. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #100003 below.

Is #100003 good for buttons?

#100003 works well for buttons and highlights, but use white text on #100003 — black text only reaches 1.02:1, below the 4.5:1 needed for normal-size labels.

Is #100003 the same as CSS black?

No — #100003 is not the CSS named color black, but black (#000000) is the closest CSS named color.

#100003 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #100003

Not just a swatch — here's how #100003 works with other colors. Named schemes with #100003 in its natural role, and a note on why the supporting colors balance it.

Vintage Leather Lead · 5 colors

Lead #100003 Secondary #7C482A 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 #100003 Secondary #B8622B Accent #7A7641 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 #100003 Surface #F1E8DC Highlight #F7F1E7 Secondary #BCAEA0 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 #100003 Anchor #141210 Accent #D39C4F 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 #100003 Secondary #291F21 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 #100003 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 60/100

Neutral

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

Softness 13/100

Very low

Firm and assertive — carries weight and contrast.

Depth 85/100

Very high

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

Naturalness 24/100

Low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 25/100

Low

Clean and current — no dusty, aged cast.

Luxury 84/100

Very high

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

Brand distinctiveness 17/100

Very low

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

UI accent fit 3/100

Very low

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

Surface fit 64/100

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 #100003

For UI

For branding

For interior

For fashion

People also use #100003 with

Deep Purple Jet Black 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 20.5:1. Use

Subtle surface Use #F1AAB7 for cards and hover fills. Tint 80

Avoid beside #0F0200 — 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 #100003 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

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Export

:root {
  --color-base: #100003;
  --color-base-rgb: 16 0 3;
  --color-base-oklch: oklch(11.1% 0.045 6.1);
  --color-50: #FEF0F3;
  --color-100: #FDD8DF;
  --color-200: #FCB1BE;
  --color-300: #F8778F;
  --color-400: #EC4665;
  --color-500: #D22243;
  --color-600: #9F2339;
  --color-700: #701F2E;
  --color-800: #481821;
  --color-900: #2C1116;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#FEF0F3',
    100: '#FDD8DF',
    200: '#FCB1BE',
    300: '#F8778F',
    400: '#EC4665',
    500: '#D22243',
    600: '#9F2339',
    700: '#701F2E',
    800: '#481821',
    900: '#2C1116',
  },
}

$base: #100003;
$base-ink: #FFFFFF;
$base-50: #FEF0F3;
$base-100: #FDD8DF;
$base-200: #FCB1BE;
$base-300: #F8778F;
$base-400: #EC4665;
$base-500: #D22243;
$base-600: #9F2339;
$base-700: #701F2E;
$base-800: #481821;
$base-900: #2C1116;
$base-hover: #0C0002;
$base-subtle: #ED7C91;

{
    "color": {
        "base": {
            "value": "#100003",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#FEF0F3",
                "type": "color"
            },
            "100": {
                "value": "#FDD8DF",
                "type": "color"
            },
            "200": {
                "value": "#FCB1BE",
                "type": "color"
            },
            "300": {
                "value": "#F8778F",
                "type": "color"
            },
            "400": {
                "value": "#EC4665",
                "type": "color"
            },
            "500": {
                "value": "#D22243",
                "type": "color"
            },
            "600": {
                "value": "#9F2339",
                "type": "color"
            },
            "700": {
                "value": "#701F2E",
                "type": "color"
            },
            "800": {
                "value": "#481821",
                "type": "color"
            },
            "900": {
                "value": "#2C1116",
                "type": "color"
            }
        }
    }
}

Palettes built on #100003

Color Lab

Pairs with #100003

UI roles & guardrails

In real applications

Scales

Every model

Export