What color is #100B15?

#100B15 is a very dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(16, 11, 21), and in HSL hsl(270, 31%, 6%).

Is #100B15 accessible as text?

On white, #100B15 has a contrast ratio of 19.43:1 (passes WCAG AA for body text); on black it is 1.08:1 (fails). For text placed on #100B15, use white for the best readability.

What is the closest Tailwind color to #100B15?

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

What colors go well with #100B15?

As a neutral, #100B15 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 #100B15 the same as CSS black?

No — #100B15 is not the CSS named color black, but black (#000000) is the closest CSS named color.

#100B15 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #100B15

Not just a swatch — here's how #100B15 works with other colors. Named schemes with #100B15 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #100B15 Surface #14161A Highlight #F4F6F8 Secondary #5C6573 Accent #2C2731

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 #100B15 Secondary #7E4631 Surface #EDD8C1 Accent #355248 Anchor #592236

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 #100B15 Surface #F2E8DD Highlight #F8F0E7 Secondary #BDADA1 Ink #2C2723

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.

Berry & Cream Lead · 5 colors

Lead #100B15 Surface #F5E6D7 Anchor #5C213F Accent #E5C2C7 Secondary #332B2F

Jet Black sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #100B15 Secondary #2F2D31 Support #9C9088 Ink #18140F

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 #100B15 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 49/100

Neutral

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

Softness 19/100

Very low

Firm and assertive — carries weight and contrast.

Depth 79/100

High

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 20/100

Low

Clean and current — no dusty, aged cast.

Luxury 77/100

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 97/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #100B15

For UI

For branding

For interior

For fashion

People also use #100B15 with

Graphite Jet Black Gainsboro Onyx

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 #CFC4DA for cards and hover fills. Tint 80

Avoid beside #120B14 — 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 #100B15 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: #100B15;
  --color-base-rgb: 16 11 21;
  --color-base-oklch: oklch(16.1% 0.022 306.9);
  --color-50: #F7F5FA;
  --color-100: #EBE4F1;
  --color-200: #D6CAE3;
  --color-300: #B8A4CC;
  --color-400: #997FB3;
  --color-500: #7A5F96;
  --color-600: #614E74;
  --color-700: #473B54;
  --color-800: #302938;
  --color-900: #1F1A23;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F7F5FA',
    100: '#EBE4F1',
    200: '#D6CAE3',
    300: '#B8A4CC',
    400: '#997FB3',
    500: '#7A5F96',
    600: '#614E74',
    700: '#473B54',
    800: '#302938',
    900: '#1F1A23',
  },
}

$base: #100B15;
$base-ink: #FFFFFF;
$base-50: #F7F5FA;
$base-100: #EBE4F1;
$base-200: #D6CAE3;
$base-300: #B8A4CC;
$base-400: #997FB3;
$base-500: #7A5F96;
$base-600: #614E74;
$base-700: #473B54;
$base-800: #302938;
$base-900: #1F1A23;
$base-hover: #0C0810;
$base-subtle: #B7A6C8;

{
    "color": {
        "base": {
            "value": "#100B15",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F7F5FA",
                "type": "color"
            },
            "100": {
                "value": "#EBE4F1",
                "type": "color"
            },
            "200": {
                "value": "#D6CAE3",
                "type": "color"
            },
            "300": {
                "value": "#B8A4CC",
                "type": "color"
            },
            "400": {
                "value": "#997FB3",
                "type": "color"
            },
            "500": {
                "value": "#7A5F96",
                "type": "color"
            },
            "600": {
                "value": "#614E74",
                "type": "color"
            },
            "700": {
                "value": "#473B54",
                "type": "color"
            },
            "800": {
                "value": "#302938",
                "type": "color"
            },
            "900": {
                "value": "#1F1A23",
                "type": "color"
            }
        }
    }
}

Palettes built on #100B15

Color Lab

Pairs with #100B15

UI roles & guardrails

In real applications

Scales

Every model

Export