What color is #03100D?

#03100D is a very dark low-chroma cool gray with a subtle cool cast. In RGB it is rgb(3, 16, 13), and in HSL hsl(166, 68%, 4%).

Is #03100D accessible as text?

On white, #03100D has a contrast ratio of 19.38:1 (passes WCAG AA for body text); on black it is 1.08:1 (fails). For text placed on #03100D, use white for the best readability.

What is the closest Tailwind color to #03100D?

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

What colors go well with #03100D?

As a neutral, #03100D 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 #03100D the same as CSS black?

No — #03100D is not the CSS named color black, but black (#000000) is the closest CSS named color.

#03100D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #03100D

Not just a swatch — here's how #03100D works with other colors. Named schemes with #03100D in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #03100D Surface #14161A Highlight #F4F6F8 Secondary #586771 Accent #1E2C29

Jet Black is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Jet Black.

Vintage Leather Lead · 5 colors

Lead #03100D Secondary #734F19 Surface #E4DCC0 Accent #3B5141 Anchor #5B231E

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 #03100D 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 #03100D Anchor #141210 Accent #BBA94C Secondary #1E2C29 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.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #03100D Secondary #292F2D Support #979286 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.

Build a working theme in the generator →

Color Lab

How #03100D 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 13/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 18/100

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 9/100

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 68/100

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 #03100D

For UI

For branding

For interior

For fashion

People also use #03100D 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 #B6E6DB for cards and hover fills. Tint 80

Avoid beside #031011 — 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 #03100D 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: #03100D;
  --color-base-rgb: 3 16 13;
  --color-base-oklch: oklch(15.8% 0.022 178.6);
  --color-50: #F2FDFA;
  --color-100: #DCF9F2;
  --color-200: #BBF2E5;
  --color-300: #8CE3CF;
  --color-400: #61D1B7;
  --color-500: #3FB69A;
  --color-600: #378B77;
  --color-700: #2C6356;
  --color-800: #204139;
  --color-900: #152824;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F2FDFA',
    100: '#DCF9F2',
    200: '#BBF2E5',
    300: '#8CE3CF',
    400: '#61D1B7',
    500: '#3FB69A',
    600: '#378B77',
    700: '#2C6356',
    800: '#204139',
    900: '#152824',
  },
}

$base: #03100D;
$base-ink: #FFFFFF;
$base-50: #F2FDFA;
$base-100: #DCF9F2;
$base-200: #BBF2E5;
$base-300: #8CE3CF;
$base-400: #61D1B7;
$base-500: #3FB69A;
$base-600: #378B77;
$base-700: #2C6356;
$base-800: #204139;
$base-900: #152824;
$base-hover: #030E0B;
$base-subtle: #90DCCA;

{
    "color": {
        "base": {
            "value": "#03100D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2FDFA",
                "type": "color"
            },
            "100": {
                "value": "#DCF9F2",
                "type": "color"
            },
            "200": {
                "value": "#BBF2E5",
                "type": "color"
            },
            "300": {
                "value": "#8CE3CF",
                "type": "color"
            },
            "400": {
                "value": "#61D1B7",
                "type": "color"
            },
            "500": {
                "value": "#3FB69A",
                "type": "color"
            },
            "600": {
                "value": "#378B77",
                "type": "color"
            },
            "700": {
                "value": "#2C6356",
                "type": "color"
            },
            "800": {
                "value": "#204139",
                "type": "color"
            },
            "900": {
                "value": "#152824",
                "type": "color"
            }
        }
    }
}

Palettes built on #03100D

Color Lab

Pairs with #03100D

UI roles & guardrails

In real applications

Scales

Every model

Export