What color is #421E91?

#421E91 is a dark indigo. In RGB it is rgb(66, 30, 145), and in HSL hsl(259, 66%, 34%).

Is #421E91 accessible as text?

On white, #421E91 has a contrast ratio of 11.50:1 (passes WCAG AA for body text); on black it is 1.83:1 (fails). For text placed on #421E91, use white for the best readability.

What is the closest Tailwind color to #421E91?

The nearest Tailwind CSS token is violet-900 (#4D179A).

What colors go well with #421E91?

#421E91 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #6C901D. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #421E91 below.

Is #421E91 good for buttons?

#421E91 works well for buttons and highlights, but use white text on #421E91 — black text only reaches 1.83:1, below the 4.5:1 needed for normal-size labels.

Is #421E91 the same as CSS indigo?

No — #421E91 is not the CSS named color indigo, but indigo (#4B0082) is the closest CSS named color.

#421E91 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #421E91

Not just a swatch — here's how #421E91 works with other colors. Named schemes with #421E91 in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #421E91 Anchor #141210 Accent #DB9757 Secondary #282732 Surface #F3ECE3

Indigo 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 #421E91 Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DA Accent #30034C

Indigo 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 Indigo.

Coastal Morning Lead · 5 colors

Lead #421E91 Accent #A5C4C3 Surface #E9D6BF Secondary #9AA0A1 Anchor #22334A

Indigo 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 #421E91 Secondary #7E4633 Surface #EDD8C2 Accent #355248 Anchor #582238

Indigo 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 #421E91 Secondary #645F86 Support #9D9088 Ink #18140F

Indigo 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 Indigo carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #421E91 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 24/100

Cool

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

Softness 26/100

Low

Firm and assertive — carries weight and contrast.

Depth 67/100

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 28/100

Low

A faint retro warmth without tipping into sepia.

Luxury 64/100

High

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

Brand distinctiveness 67/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 60/100

High

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

Surface fit 16/100

Very low

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

Print safety 76/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #421E91

For UI

For branding

For interior

For fashion

People also use #421E91 with

Cobalt Blue Dark Magenta Olive Drab 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 11.5:1. Use

Subtle surface Use #D7CDED for cards and hover fills. Tint 80

Avoid beside #681D90 — 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 #421E91 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: #421E91;
  --color-base-rgb: 66 30 145;
  --color-base-oklch: oklch(36.6% 0.173 289.1);
  --color-50: #F5F2FD;
  --color-100: #E5DCF9;
  --color-200: #CCBBF1;
  --color-300: #A88DE2;
  --color-400: #8562D0;
  --color-500: #6540B5;
  --color-600: #52388A;
  --color-700: #3E2D62;
  --color-800: #2B2140;
  --color-900: #1B1628;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  indigo: {
    50: '#F5F2FD',
    100: '#E5DCF9',
    200: '#CCBBF1',
    300: '#A88DE2',
    400: '#8562D0',
    500: '#6540B5',
    600: '#52388A',
    700: '#3E2D62',
    800: '#2B2140',
    900: '#1B1628',
  },
}

$base: #421E91;
$base-ink: #FFFFFF;
$base-50: #F5F2FD;
$base-100: #E5DCF9;
$base-200: #CCBBF1;
$base-300: #A88DE2;
$base-400: #8562D0;
$base-500: #6540B5;
$base-600: #52388A;
$base-700: #3E2D62;
$base-800: #2B2140;
$base-900: #1B1628;
$base-hover: #351873;
$base-subtle: #C3B3E6;

{
    "color": {
        "base": {
            "value": "#421E91",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F2FD",
                "type": "color"
            },
            "100": {
                "value": "#E5DCF9",
                "type": "color"
            },
            "200": {
                "value": "#CCBBF1",
                "type": "color"
            },
            "300": {
                "value": "#A88DE2",
                "type": "color"
            },
            "400": {
                "value": "#8562D0",
                "type": "color"
            },
            "500": {
                "value": "#6540B5",
                "type": "color"
            },
            "600": {
                "value": "#52388A",
                "type": "color"
            },
            "700": {
                "value": "#3E2D62",
                "type": "color"
            },
            "800": {
                "value": "#2B2140",
                "type": "color"
            },
            "900": {
                "value": "#1B1628",
                "type": "color"
            }
        }
    }
}

Palettes built on #421E91

Color Lab

Pairs with #421E91

UI roles & guardrails

In real applications

Scales

Every model

Export