What color is #100B28?

#100B28 is a very dark indigo. In RGB it is rgb(16, 11, 40), and in HSL hsl(250, 57%, 10%).

Is #100B28 accessible as text?

On white, #100B28 has a contrast ratio of 19.08:1 (passes WCAG AA for body text); on black it is 1.10:1 (fails). For text placed on #100B28, use white for the best readability.

What is the closest Tailwind color to #100B28?

The nearest Tailwind CSS token is mauve-900 (#1D161E).

What colors go well with #100B28?

#100B28 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #23280B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #100B28 below.

Is #100B28 good for buttons?

#100B28 works well for buttons and highlights, but use white text on #100B28 — black text only reaches 1.10:1, below the 4.5:1 needed for normal-size labels.

Is #100B28 the same as CSS midnightblue?

No — #100B28 is not the CSS named color midnightblue, but midnightblue (#191970) is the closest CSS named color by perceptual color distance — it sits in a different color family, so treat it as a rough reference, not a match.

#100B28 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #100B28

Not just a swatch — here's how #100B28 works with other colors. Named schemes with #100B28 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #100B28 Accent #A5C4C3 Surface #E9D6BF Secondary #9AA0A1 Anchor #22334A

Jet Black opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Nordic Calm Accent · 5 colors

Accent #100B28 Secondary #AFB4B8 Surface #F1F2F0 Support #7E92A7 Anchor #2E3236

Jet Black keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Vintage Leather Lead · 5 colors

Lead #100B28 Secondary #7E4533 Surface #EDD8C2 Accent #365247 Anchor #582238

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.

Luxury Packaging Feature · 5 colors

Feature #100B28 Anchor #141210 Accent #DB9757 Secondary #282732 Surface #F3ECE3

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 #F8F4EF Accent #100B28 Secondary #31313C Support #9D9088 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 #100B28 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 41/100

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 25/100

Low

A faint retro warmth without tipping into sepia.

Luxury 80/100

High

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

Brand distinctiveness 22/100

Low

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

UI accent fit 9/100

Very low

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

Surface fit 56/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 92/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #100B28

For UI

For branding

For interior

For fashion

People also use #100B28 with

Prussian Blue Graphite Bistre Gainsboro

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 19.1:1. Use

Subtle surface Use #C5BEE4 for cards and hover fills. Tint 80

Avoid beside #1A0B28 — 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 #100B28 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

Every model

Export

:root {
  --color-base: #100B28;
  --color-base-rgb: 16 11 40;
  --color-base-oklch: oklch(17.6% 0.057 287.0);
  --color-50: #F4F3FC;
  --color-100: #E2DEF7;
  --color-200: #C7BFED;
  --color-300: #9F93DC;
  --color-400: #7A6AC8;
  --color-500: #5948AD;
  --color-600: #493D84;
  --color-700: #38305E;
  --color-800: #27233E;
  --color-900: #191726;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F4F3FC',
    100: '#E2DEF7',
    200: '#C7BFED',
    300: '#9F93DC',
    400: '#7A6AC8',
    500: '#5948AD',
    600: '#493D84',
    700: '#38305E',
    800: '#27233E',
    900: '#191726',
  },
}

$base: #100B28;
$base-ink: #FFFFFF;
$base-50: #F4F3FC;
$base-100: #E2DEF7;
$base-200: #C7BFED;
$base-300: #9F93DC;
$base-400: #7A6AC8;
$base-500: #5948AD;
$base-600: #493D84;
$base-700: #38305E;
$base-800: #27233E;
$base-900: #191726;
$base-hover: #0D0920;
$base-subtle: #A69CD8;

{
    "color": {
        "base": {
            "value": "#100B28",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F3FC",
                "type": "color"
            },
            "100": {
                "value": "#E2DEF7",
                "type": "color"
            },
            "200": {
                "value": "#C7BFED",
                "type": "color"
            },
            "300": {
                "value": "#9F93DC",
                "type": "color"
            },
            "400": {
                "value": "#7A6AC8",
                "type": "color"
            },
            "500": {
                "value": "#5948AD",
                "type": "color"
            },
            "600": {
                "value": "#493D84",
                "type": "color"
            },
            "700": {
                "value": "#38305E",
                "type": "color"
            },
            "800": {
                "value": "#27233E",
                "type": "color"
            },
            "900": {
                "value": "#191726",
                "type": "color"
            }
        }
    }
}

Palettes built on #100B28

Color Lab

Pairs with #100B28

UI roles & guardrails

In real applications

Scales

Every model

Export