What color is #421EA4?

#421EA4 is a dark indigo. In RGB it is rgb(66, 30, 164), and in HSL hsl(256, 69%, 38%).

Is #421EA4 accessible as text?

On white, #421EA4 has a contrast ratio of 10.75:1 (passes WCAG AA for body text); on black it is 1.95:1 (fails). For text placed on #421EA4, use white for the best readability.

What is the closest Tailwind color to #421EA4?

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

What colors go well with #421EA4?

#421EA4 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #80A41E. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #421EA4 below.

Is #421EA4 good for buttons?

#421EA4 works well for buttons and highlights, but use white text on #421EA4 — black text only reaches 1.95:1, below the 4.5:1 needed for normal-size labels.

Is #421EA4 the same as CSS indigo?

No — #421EA4 is not the CSS named color indigo, but indigo (#4B0082) is the closest CSS named color.

#421EA4 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #421EA4

Not just a swatch — here's how #421EA4 works with other colors. Named schemes with #421EA4 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #421EA4 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #5F4EC2

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

Berry & Cream Lead · 5 colors

Lead #421EA4 Surface #F5E5D7 Anchor #5B2142 Accent #E5C2C8 Secondary #332B2F

Egyptian Blue 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 #421EA4 Secondary #666591 Support #9D9088 Ink #18140F

Egyptian 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 Egyptian Blue carrying the quiet middle.

Coastal Morning Lead · 5 colors

Lead #421EA4 Accent #A5C4C3 Surface #EAD5BF Secondary #9AA0A1 Anchor #22334A

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

Sunset Warmth Glow · 5 colors

Glow #421EA4 Secondary #E86A6F Accent #F5934C Anchor #583B57 Surface #F7E7D7

Egyptian Blue glows at the center of this sunset palette, joined by coral and gold, deepened by a plum anchor and cooled with cream.

Build a working theme in the generator →

Color Lab

How #421EA4 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 21/100

Cool

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

Softness 26/100

Low

Firm and assertive — carries weight and contrast.

Depth 66/100

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 22/100

Low

Clean and current — no dusty, aged cast.

Luxury 61/100

High

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

Brand distinctiveness 75/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 62/100

High

Strong interactive accent — visible and can carry a legible label.

Surface fit 15/100

Very low

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

Print safety 72/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #421EA4

For UI

For branding

For interior

For fashion

People also use #421EA4 with

Cerulean Mauveine Greenery Gainsboro Russian Violet

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 10.8:1. Use

Subtle surface Use #D8D0EF for cards and hover fills. Tint 80

Avoid beside #6E1EA4 — 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 #421EA4 at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

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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: #421EA4;
  --color-base-rgb: 66 30 164;
  --color-base-oklch: oklch(38.5% 0.194 285.0);
  --color-50: #F5F2FD;
  --color-100: #E4DCF9;
  --color-200: #C9BAF2;
  --color-300: #A38BE4;
  --color-400: #7E60D2;
  --color-500: #5E3EB7;
  --color-600: #4D368C;
  --color-700: #3A2C63;
  --color-800: #292041;
  --color-900: #1A1528;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  egyptian-blue: {
    50: '#F5F2FD',
    100: '#E4DCF9',
    200: '#C9BAF2',
    300: '#A38BE4',
    400: '#7E60D2',
    500: '#5E3EB7',
    600: '#4D368C',
    700: '#3A2C63',
    800: '#292041',
    900: '#1A1528',
  },
}

$base: #421EA4;
$base-ink: #FFFFFF;
$base-50: #F5F2FD;
$base-100: #E4DCF9;
$base-200: #C9BAF2;
$base-300: #A38BE4;
$base-400: #7E60D2;
$base-500: #5E3EB7;
$base-600: #4D368C;
$base-700: #3A2C63;
$base-800: #292041;
$base-900: #1A1528;
$base-hover: #351883;
$base-subtle: #C4B7E8;

{
    "color": {
        "base": {
            "value": "#421EA4",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F2FD",
                "type": "color"
            },
            "100": {
                "value": "#E4DCF9",
                "type": "color"
            },
            "200": {
                "value": "#C9BAF2",
                "type": "color"
            },
            "300": {
                "value": "#A38BE4",
                "type": "color"
            },
            "400": {
                "value": "#7E60D2",
                "type": "color"
            },
            "500": {
                "value": "#5E3EB7",
                "type": "color"
            },
            "600": {
                "value": "#4D368C",
                "type": "color"
            },
            "700": {
                "value": "#3A2C63",
                "type": "color"
            },
            "800": {
                "value": "#292041",
                "type": "color"
            },
            "900": {
                "value": "#1A1528",
                "type": "color"
            }
        }
    }
}

Palettes built on #421EA4

Color Lab

Pairs with #421EA4

UI roles & guardrails

In real applications

Scales

Every model

Export