What color is #643BFC?

#643BFC is a medium, vivid indigo. In RGB it is rgb(100, 59, 252), and in HSL hsl(253, 97%, 61%).

Is #643BFC accessible as text?

On white, #643BFC has a contrast ratio of 5.88:1 (passes WCAG AA for body text); on black it is 3.57:1 (fails). For text placed on #643BFC, use white for the best readability.

What is the closest Tailwind color to #643BFC?

The nearest Tailwind CSS token is indigo-600 (#4F39F6).

What colors go well with #643BFC?

#643BFC pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #D2FC3B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #643BFC below.

Is #643BFC good for buttons?

#643BFC works well for buttons and highlights, but use white text on #643BFC — black text only reaches 3.57:1, below the 4.5:1 needed for normal-size labels.

Is #643BFC the same as CSS blueviolet?

No — #643BFC is not the CSS named color blueviolet, but blueviolet (#8A2BE2) is the closest CSS named color by perceptual color distance — it sits in a different color family, so treat it as a rough reference, not a match.

#643BFC Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #643BFC

Not just a swatch — here's how #643BFC works with other colors. Named schemes with #643BFC in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #643BFC Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #8270FF

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 #643BFC Surface #F5E5D7 Anchor #5B2142 Accent #E5C2C9 Secondary #332B2F

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 #643BFC Secondary #8E8FCE 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 #643BFC Accent #A5C4C3 Surface #EAD5BF Secondary #9AA0A1 Anchor #22334A

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 #643BFC Secondary #E86A70 Accent #F5934D 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 #643BFC 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 20/100

Cool

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

Softness 27/100

Low

Firm and assertive — carries weight and contrast.

Depth 52/100

Moderate

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 44/100

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 54/100

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 61/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #643BFC

For UI

For branding

For interior

For fashion

People also use #643BFC with

Cornflower Blue Electric Purple Pear Gainsboro Russian Violet

UI roles & guardrails

Primary action Safe as a filled button with white label. AA

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 5.9:1. Use

Subtle surface Use #E3DDF9 for cards and hover fills. Tint 80

Avoid beside #A53BFC — 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 #643BFC 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: #643BFC;
  --color-base-rgb: 100 59 252;
  --color-base-oklch: oklch(53.4% 0.263 282.6);
  --color-50: #F3F0FE;
  --color-100: #E0D8FD;
  --color-200: #C1B1FC;
  --color-300: #9479F6;
  --color-400: #6C49E9;
  --color-500: #4A25D0;
  --color-600: #3F259D;
  --color-700: #31206F;
  --color-800: #231948;
  --color-900: #17112C;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  han-purple: {
    50: '#F3F0FE',
    100: '#E0D8FD',
    200: '#C1B1FC',
    300: '#9479F6',
    400: '#6C49E9',
    500: '#4A25D0',
    600: '#3F259D',
    700: '#31206F',
    800: '#231948',
    900: '#17112C',
  },
}

$base: #643BFC;
$base-ink: #FFFFFF;
$base-50: #F3F0FE;
$base-100: #E0D8FD;
$base-200: #C1B1FC;
$base-300: #9479F6;
$base-400: #6C49E9;
$base-500: #4A25D0;
$base-600: #3F259D;
$base-700: #31206F;
$base-800: #231948;
$base-900: #17112C;
$base-hover: #3804F5;
$base-subtle: #D5CBF7;

{
    "color": {
        "base": {
            "value": "#643BFC",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F0FE",
                "type": "color"
            },
            "100": {
                "value": "#E0D8FD",
                "type": "color"
            },
            "200": {
                "value": "#C1B1FC",
                "type": "color"
            },
            "300": {
                "value": "#9479F6",
                "type": "color"
            },
            "400": {
                "value": "#6C49E9",
                "type": "color"
            },
            "500": {
                "value": "#4A25D0",
                "type": "color"
            },
            "600": {
                "value": "#3F259D",
                "type": "color"
            },
            "700": {
                "value": "#31206F",
                "type": "color"
            },
            "800": {
                "value": "#231948",
                "type": "color"
            },
            "900": {
                "value": "#17112C",
                "type": "color"
            }
        }
    }
}

Palettes built on #643BFC

Color Lab

Pairs with #643BFC

UI roles & guardrails

In real applications

Scales

Every model

Export