What color is #100BA2?

#100BA2 is a dark, vivid blue. In RGB it is rgb(16, 11, 162), and in HSL hsl(242, 87%, 34%).

Is #100BA2 accessible as text?

On white, #100BA2 has a contrast ratio of 13.19:1 (passes WCAG AA for body text); on black it is 1.59:1 (fails). For text placed on #100BA2, use white for the best readability.

What is the closest Tailwind color to #100BA2?

The nearest Tailwind CSS token is indigo-800 (#372AAC).

What colors go well with #100BA2?

#100BA2 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #9DA20B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #100BA2 below.

Is #100BA2 good for buttons?

#100BA2 works well for buttons and highlights, but use white text on #100BA2 — black text only reaches 1.59:1, below the 4.5:1 needed for normal-size labels.

Is #100BA2 the same as CSS darkblue?

No — #100BA2 is not the CSS named color darkblue, but darkblue (#00008B) is the closest CSS named color.

#100BA2 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #100BA2

Not just a swatch — here's how #100BA2 works with other colors. Named schemes with #100BA2 in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #100BA2 Anchor #141210 Accent #DD965A Secondary #242933 Surface #F4ECE3

Zaffre 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.

Tech Product Signal · 5 colors

Signal #100BA2 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #2745BF

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

Moody Editorial Color · 5 colors

Color #100BA2 Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #1C0059

Zaffre 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 Zaffre.

Coastal Morning Lead · 5 colors

Lead #100BA2 Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #100BA2 Secondary #495A86 Support #9D8F88 Ink #18140F

Zaffre 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 Zaffre carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #100BA2 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 10/100

Cool

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

Softness 21/100

Low

Firm and assertive — carries weight and contrast.

Depth 72/100

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 14/100

Very low

Clean and current — no dusty, aged cast.

Luxury 63/100

High

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

Brand distinctiveness 83/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 41/100

Moderate

Workable accent with care around contrast.

Surface fit 18/100

Very low

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

Print safety 62/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #100BA2

For UI

For branding

For interior

For fashion

People also use #100BA2 with

True Blue Grape Moss 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 13.2:1. Use

Subtle surface Use #CAC8F2 for cards and hover fills. Tint 80

Avoid beside #430BA2 — 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 #100BA2 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: #100BA2;
  --color-base-rgb: 16 11 162;
  --color-base-oklch: oklch(33.3% 0.215 267.0);
  --color-50: #F1F0FE;
  --color-100: #D9D8FD;
  --color-200: #B5B3FA;
  --color-300: #837FF0;
  --color-400: #5651E1;
  --color-500: #332EC7;
  --color-600: #2E2B97;
  --color-700: #27246B;
  --color-800: #1D1C45;
  --color-900: #14132A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  zaffre: {
    50: '#F1F0FE',
    100: '#D9D8FD',
    200: '#B5B3FA',
    300: '#837FF0',
    400: '#5651E1',
    500: '#332EC7',
    600: '#2E2B97',
    700: '#27246B',
    800: '#1D1C45',
    900: '#14132A',
  },
}

$base: #100BA2;
$base-ink: #FFFFFF;
$base-50: #F1F0FE;
$base-100: #D9D8FD;
$base-200: #B5B3FA;
$base-300: #837FF0;
$base-400: #5651E1;
$base-500: #332EC7;
$base-600: #2E2B97;
$base-700: #27246B;
$base-800: #1D1C45;
$base-900: #14132A;
$base-hover: #0D0982;
$base-subtle: #ADABEE;

{
    "color": {
        "base": {
            "value": "#100BA2",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F0FE",
                "type": "color"
            },
            "100": {
                "value": "#D9D8FD",
                "type": "color"
            },
            "200": {
                "value": "#B5B3FA",
                "type": "color"
            },
            "300": {
                "value": "#837FF0",
                "type": "color"
            },
            "400": {
                "value": "#5651E1",
                "type": "color"
            },
            "500": {
                "value": "#332EC7",
                "type": "color"
            },
            "600": {
                "value": "#2E2B97",
                "type": "color"
            },
            "700": {
                "value": "#27246B",
                "type": "color"
            },
            "800": {
                "value": "#1D1C45",
                "type": "color"
            },
            "900": {
                "value": "#14132A",
                "type": "color"
            }
        }
    }
}

Palettes built on #100BA2

Color Lab

Pairs with #100BA2

UI roles & guardrails

In real applications

Scales

Every model

Export