What color is #643CB3?

#643CB3 is a medium violet. In RGB it is rgb(100, 60, 179), and in HSL hsl(260, 50%, 47%).

Is #643CB3 accessible as text?

On white, #643CB3 has a contrast ratio of 7.40:1 (passes WCAG AA for body text); on black it is 2.84:1 (fails). For text placed on #643CB3, use white for the best readability.

What is the closest Tailwind color to #643CB3?

The nearest Tailwind CSS token is purple-800 (#6E11B0).

What colors go well with #643CB3?

#643CB3 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #8CB43C. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #643CB3 below.

Is #643CB3 good for buttons?

#643CB3 works well for buttons and highlights, but use white text on #643CB3 — black text only reaches 2.84:1, below the 4.5:1 needed for normal-size labels.

Is #643CB3 the same as CSS rebeccapurple?

No — #643CB3 is not the CSS named color rebeccapurple, but rebeccapurple (#663399) is the closest CSS named color.

#643CB3 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #643CB3

Not just a swatch — here's how #643CB3 works with other colors. Named schemes with #643CB3 in its natural role, and a note on why the supporting colors balance it.

Berry & Cream Lead · 5 colors

Lead #643CB3 Surface #F5E5D7 Anchor #5C2141 Accent #E5C2C8 Secondary #332B2F

Grape sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Coastal Morning Lead · 5 colors

Lead #643CB3 Accent #A5C4C3 Surface #E9D6BF Secondary #9AA0A1 Anchor #23334A

Grape 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 #643CB3 Secondary #7E4632 Surface #EDD8C2 Accent #355248 Anchor #582237

Grape plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Modern Café Dominant · 5 colors

Dominant #643CB3 Anchor #3B2923 Surface #F3E1D1 Accent #749F7D Secondary #3C3734

Grape anchors this café scheme as the warm mid-tone, lifted by latte cream and a muted sage accent and grounded by espresso brown and a warm charcoal.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #643CB3 Secondary #857CA6 Support #9D9088 Ink #18140F

Grape 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 Grape carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #643CB3 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 28/100

Cool

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

Softness 32/100

Low

Middle-weight — neither delicate nor heavy.

Depth 56/100

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 32/100

Low

A faint retro warmth without tipping into sepia.

Luxury 55/100

Moderate

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

Brand distinctiveness 48/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 89/100

Very high

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

Surface fit 9/100

Very low

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

Print safety 77/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #643CB3

For UI

For branding

For interior

For fashion

People also use #643CB3 with

Very Peri Byzantine 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 7.4:1. Use

Subtle surface Use #E1DAEE for cards and hover fills. Tint 80

Avoid beside #8C3CB4 — 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 #643CB3 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: #643CB3;
  --color-base-rgb: 100 60 179;
  --color-base-oklch: oklch(47.1% 0.179 293.9);
  --color-50: #F6F3FC;
  --color-100: #E7E0F5;
  --color-200: #CFC2EB;
  --color-300: #AD97D8;
  --color-400: #8B70C2;
  --color-500: #6C4EA6;
  --color-600: #574280;
  --color-700: #41335C;
  --color-800: #2C243C;
  --color-900: #1C1825;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  grape: {
    50: '#F6F3FC',
    100: '#E7E0F5',
    200: '#CFC2EB',
    300: '#AD97D8',
    400: '#8B70C2',
    500: '#6C4EA6',
    600: '#574280',
    700: '#41335C',
    800: '#2C243C',
    900: '#1C1825',
  },
}

$base: #643CB3;
$base-ink: #FFFFFF;
$base-50: #F6F3FC;
$base-100: #E7E0F5;
$base-200: #CFC2EB;
$base-300: #AD97D8;
$base-400: #8B70C2;
$base-500: #6C4EA6;
$base-600: #574280;
$base-700: #41335C;
$base-800: #2C243C;
$base-900: #1C1825;
$base-hover: #503090;
$base-subtle: #D1C7E6;

{
    "color": {
        "base": {
            "value": "#643CB3",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F6F3FC",
                "type": "color"
            },
            "100": {
                "value": "#E7E0F5",
                "type": "color"
            },
            "200": {
                "value": "#CFC2EB",
                "type": "color"
            },
            "300": {
                "value": "#AD97D8",
                "type": "color"
            },
            "400": {
                "value": "#8B70C2",
                "type": "color"
            },
            "500": {
                "value": "#6C4EA6",
                "type": "color"
            },
            "600": {
                "value": "#574280",
                "type": "color"
            },
            "700": {
                "value": "#41335C",
                "type": "color"
            },
            "800": {
                "value": "#2C243C",
                "type": "color"
            },
            "900": {
                "value": "#1C1825",
                "type": "color"
            }
        }
    }
}

Palettes built on #643CB3

Color Lab

Pairs with #643CB3

UI roles & guardrails

In real applications

Scales

Every model

Export