What color is #421BDE?

#421BDE is a medium, vivid indigo. In RGB it is rgb(66, 27, 222), and in HSL hsl(252, 78%, 49%).

Is #421BDE accessible as text?

On white, #421BDE has a contrast ratio of 8.60:1 (passes WCAG AA for body text); on black it is 2.44:1 (fails). For text placed on #421BDE, use white for the best readability.

What is the closest Tailwind color to #421BDE?

The nearest Tailwind CSS token is indigo-700 (#432DD7).

What colors go well with #421BDE?

#421BDE pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #B7DE1B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #421BDE below.

Is #421BDE good for buttons?

#421BDE works well for buttons and highlights, but use white text on #421BDE — black text only reaches 2.44:1, below the 4.5:1 needed for normal-size labels.

Is #421BDE the same as CSS blue?

No — #421BDE is not the CSS named color blue, but blue (#0000FF) is the closest CSS named color.

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

Palettes built on #421BDE

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

Tech Product Signal · 5 colors

Signal #421BDE Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #5C59FB

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

Berry & Cream Lead · 5 colors

Lead #421BDE Surface #F6E5D8 Anchor #5B2142 Accent #E5C2C9 Secondary #322B2F

Han Purple 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 #421BDE Secondary #6F77B2 Support #9D9088 Ink #18140F

Han Purple 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 Han Purple carrying the quiet middle.

Coastal Morning Lead · 5 colors

Lead #421BDE Accent #A5C4C2 Surface #EAD5BF Secondary #9AA0A1 Anchor #22344A

Han Purple 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 #421BDE Secondary #E86A72 Accent #F6934E Anchor #583B57 Surface #F7E7D7

Han Purple 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 #421BDE 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 23/100

Low

Firm and assertive — carries weight and contrast.

Depth 62/100

High

Mid depth — usable as an accent or a muted ground.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 4/100

Very low

Clean and current — no dusty, aged cast.

Luxury 51/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 100/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 50/100

Moderate

Workable accent with care around contrast.

Surface fit 11/100

Very low

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

Print safety 59/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #421BDE

For UI

For branding

For interior

For fashion

People also use #421BDE with

Azure Dark Orchid Yellow 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 8.6:1. Use

Subtle surface Use #DCD6F4 for cards and hover fills. Tint 80

Avoid beside #831BDE — 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 #421BDE 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: #421BDE;
  --color-base-rgb: 66 27 222;
  --color-base-oklch: oklch(44.7% 0.259 276.9);
  --color-50: #F3F1FE;
  --color-100: #E1DAFB;
  --color-200: #C3B6F6;
  --color-300: #9985EA;
  --color-400: #7258DA;
  --color-500: #5136BF;
  --color-600: #443091;
  --color-700: #352867;
  --color-800: #251E43;
  --color-900: #181429;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  han-purple: {
    50: '#F3F1FE',
    100: '#E1DAFB',
    200: '#C3B6F6',
    300: '#9985EA',
    400: '#7258DA',
    500: '#5136BF',
    600: '#443091',
    700: '#352867',
    800: '#251E43',
    900: '#181429',
  },
}

$base: #421BDE;
$base-ink: #FFFFFF;
$base-50: #F3F1FE;
$base-100: #E1DAFB;
$base-200: #C3B6F6;
$base-300: #9985EA;
$base-400: #7258DA;
$base-500: #5136BF;
$base-600: #443091;
$base-700: #352867;
$base-800: #251E43;
$base-900: #181429;
$base-hover: #3516B2;
$base-subtle: #CAC1EF;

{
    "color": {
        "base": {
            "value": "#421BDE",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F1FE",
                "type": "color"
            },
            "100": {
                "value": "#E1DAFB",
                "type": "color"
            },
            "200": {
                "value": "#C3B6F6",
                "type": "color"
            },
            "300": {
                "value": "#9985EA",
                "type": "color"
            },
            "400": {
                "value": "#7258DA",
                "type": "color"
            },
            "500": {
                "value": "#5136BF",
                "type": "color"
            },
            "600": {
                "value": "#443091",
                "type": "color"
            },
            "700": {
                "value": "#352867",
                "type": "color"
            },
            "800": {
                "value": "#251E43",
                "type": "color"
            },
            "900": {
                "value": "#181429",
                "type": "color"
            }
        }
    }
}

Palettes built on #421BDE

Color Lab

Pairs with #421BDE

UI roles & guardrails

In real applications

Scales

Every model

Export