What color is #100B6B?

#100B6B is a dark, vivid blue. In RGB it is rgb(16, 11, 107), and in HSL hsl(243, 81%, 23%).

Is #100B6B accessible as text?

On white, #100B6B has a contrast ratio of 16.38:1 (passes WCAG AA for body text); on black it is 1.28:1 (fails). For text placed on #100B6B, use white for the best readability.

What is the closest Tailwind color to #100B6B?

The nearest Tailwind CSS token is violet-950 (#2F0D68).

What colors go well with #100B6B?

#100B6B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #656A0B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #100B6B below.

Is #100B6B good for buttons?

#100B6B works well for buttons and highlights, but use white text on #100B6B — black text only reaches 1.28:1, below the 4.5:1 needed for normal-size labels.

Is #100B6B the same as CSS midnightblue?

No — #100B6B is not the CSS named color midnightblue, but midnightblue (#191970) is the closest CSS named color.

#100B6B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #100B6B

Not just a swatch — here's how #100B6B works with other colors. Named schemes with #100B6B in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #100B6B Anchor #141210 Accent #DC9659 Secondary #252933 Surface #F3ECE3

Midnight Blue 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.

Moody Editorial Color · 5 colors

Color #100B6B Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #0D0030

Midnight Blue adds the colour to this moody editorial scheme — charcoal and a mid-grey around it, a bone highlight, and a muted jewel accent drawn from Midnight Blue.

Coastal Morning Lead · 5 colors

Lead #100B6B Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

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

Vintage Leather Lead · 5 colors

Lead #100B6B Secondary #7F4535 Surface #EED7C2 Accent #365246 Anchor #582239

Midnight Blue plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #100B6B Secondary #3C4664 Support #9D8F88 Ink #18140F

Midnight Blue 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 Midnight Blue carrying the quiet middle.

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Color Lab

How #100B6B 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 16/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 20/100

Low

Firm and assertive — carries weight and contrast.

Depth 77/100

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 24/100

Low

Clean and current — no dusty, aged cast.

Luxury 75/100

High

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

Brand distinctiveness 59/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 28/100

Low

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

Surface fit 23/100

Low

Too saturated or mid-toned for big areas — keep it to accents.

Print safety 74/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #100B6B

For UI

For branding

For interior

For fashion

People also use #100B6B with

Classic Blue Indigo Dark Olive Green Gainsboro Prussian Blue

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 16.4:1. Use

Subtle surface Use #C3C1EF for cards and hover fills. Tint 80

Avoid beside #300B6A — 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 #100B6B 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: #100B6B;
  --color-base-rgb: 16 11 107;
  --color-base-oklch: oklch(25.8% 0.152 270.5);
  --color-50: #F1F1FE;
  --color-100: #DBD9FC;
  --color-200: #B9B5F7;
  --color-300: #8983EC;
  --color-400: #5D56DC;
  --color-500: #3A33C2;
  --color-600: #342E93;
  --color-700: #2A2768;
  --color-800: #1F1D44;
  --color-900: #15142A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  midnight-blue: {
    50: '#F1F1FE',
    100: '#DBD9FC',
    200: '#B9B5F7',
    300: '#8983EC',
    400: '#5D56DC',
    500: '#3A33C2',
    600: '#342E93',
    700: '#2A2768',
    800: '#1F1D44',
    900: '#15142A',
  },
}

$base: #100B6B;
$base-ink: #FFFFFF;
$base-50: #F1F1FE;
$base-100: #DBD9FC;
$base-200: #B9B5F7;
$base-300: #8983EC;
$base-400: #5D56DC;
$base-500: #3A33C2;
$base-600: #342E93;
$base-700: #2A2768;
$base-800: #1F1D44;
$base-900: #15142A;
$base-hover: #0D0955;
$base-subtle: #A3A0E8;

{
    "color": {
        "base": {
            "value": "#100B6B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F1FE",
                "type": "color"
            },
            "100": {
                "value": "#DBD9FC",
                "type": "color"
            },
            "200": {
                "value": "#B9B5F7",
                "type": "color"
            },
            "300": {
                "value": "#8983EC",
                "type": "color"
            },
            "400": {
                "value": "#5D56DC",
                "type": "color"
            },
            "500": {
                "value": "#3A33C2",
                "type": "color"
            },
            "600": {
                "value": "#342E93",
                "type": "color"
            },
            "700": {
                "value": "#2A2768",
                "type": "color"
            },
            "800": {
                "value": "#1F1D44",
                "type": "color"
            },
            "900": {
                "value": "#15142A",
                "type": "color"
            }
        }
    }
}

Palettes built on #100B6B

Color Lab

Pairs with #100B6B

UI roles & guardrails

In real applications

Scales

Every model

Export