What color is #643A6E?

#643A6E is a dark, muted purple. In RGB it is rgb(100, 58, 110), and in HSL hsl(288, 31%, 33%).

Is #643A6E accessible as text?

On white, #643A6E has a contrast ratio of 8.85:1 (passes WCAG AA for body text); on black it is 2.37:1 (fails). For text placed on #643A6E, use white for the best readability.

What is the closest Tailwind color to #643A6E?

The nearest Tailwind CSS token is mauve-600 (#594C5B).

What colors go well with #643A6E?

#643A6E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #446E3A. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #643A6E below.

Is #643A6E good for buttons?

#643A6E works well for buttons and highlights, but use white text on #643A6E — black text only reaches 2.37:1, below the 4.5:1 needed for normal-size labels.

Is #643A6E the same as CSS darkslateblue?

No — #643A6E is not the CSS named color darkslateblue, but darkslateblue (#483D8B) 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.

#643A6E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #643A6E

Not just a swatch — here's how #643A6E works with other colors. Named schemes with #643A6E in its natural role, and a note on why the supporting colors balance it.

Berry & Cream Lead · 5 colors

Lead #643A6E Surface #F5E6D7 Anchor #5D203E Accent #E5C2C6 Secondary #332B2E

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

Vintage Leather Lead · 5 colors

Lead #643A6E Secondary #7E462F Surface #ECD8C1 Accent #345249 Anchor #592235

Byzantium 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 #643A6E Anchor #3B2922 Surface #F2E2D1 Accent #9E9362 Secondary #3C3733

Byzantium 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 #643A6E Secondary #7E6F81 Support #9C9087 Ink #18140F

Byzantium 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 Byzantium carrying the quiet middle.

Tech Product Signal · 5 colors

Signal #643A6E Surface #14161A Highlight #F4F6F8 Secondary #5C6573 Accent #855E8F

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

Build a working theme in the generator →

Color Lab

How #643A6E 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 50/100

Neutral

Balanced temperature — flexible, sits between warm and cool schemes.

Softness 37/100

Low

Middle-weight — neither delicate nor heavy.

Depth 58/100

Moderate

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

Naturalness 1/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 62/100

High

Faded, nostalgic quality — editorial, heritage and retro work.

Luxury 63/100

High

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

Brand distinctiveness 26/100

Low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 75/100

High

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

Surface fit 28/100

Low

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

Print safety 89/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #643A6E

For UI

For branding

For interior

For fashion

People also use #643A6E with

Ultra Violet Eggplant Dark Olive Green Gainsboro

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 8.9:1. Use

Subtle surface Use #E1D5E4 for cards and hover fills. Tint 80

Avoid beside #6E3A67 — 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 #643A6E 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: #643A6E;
  --color-base-rgb: 100 58 110;
  --color-base-oklch: oklch(42.1% 0.097 319.7);
  --color-50: #F9F5FA;
  --color-100: #EFE4F1;
  --color-200: #DECAE3;
  --color-300: #C4A4CC;
  --color-400: #A87FB3;
  --color-500: #8B5F96;
  --color-600: #6C4E74;
  --color-700: #4F3B54;
  --color-800: #352938;
  --color-900: #211A23;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  byzantium: {
    50: '#F9F5FA',
    100: '#EFE4F1',
    200: '#DECAE3',
    300: '#C4A4CC',
    400: '#A87FB3',
    500: '#8B5F96',
    600: '#6C4E74',
    700: '#4F3B54',
    800: '#352938',
    900: '#211A23',
  },
}

$base: #643A6E;
$base-ink: #FFFFFF;
$base-50: #F9F5FA;
$base-100: #EFE4F1;
$base-200: #DECAE3;
$base-300: #C4A4CC;
$base-400: #A87FB3;
$base-500: #8B5F96;
$base-600: #6C4E74;
$base-700: #4F3B54;
$base-800: #352938;
$base-900: #211A23;
$base-hover: #502E58;
$base-subtle: #D3C0D8;

{
    "color": {
        "base": {
            "value": "#643A6E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F9F5FA",
                "type": "color"
            },
            "100": {
                "value": "#EFE4F1",
                "type": "color"
            },
            "200": {
                "value": "#DECAE3",
                "type": "color"
            },
            "300": {
                "value": "#C4A4CC",
                "type": "color"
            },
            "400": {
                "value": "#A87FB3",
                "type": "color"
            },
            "500": {
                "value": "#8B5F96",
                "type": "color"
            },
            "600": {
                "value": "#6C4E74",
                "type": "color"
            },
            "700": {
                "value": "#4F3B54",
                "type": "color"
            },
            "800": {
                "value": "#352938",
                "type": "color"
            },
            "900": {
                "value": "#211A23",
                "type": "color"
            }
        }
    }
}

Palettes built on #643A6E

Color Lab

Pairs with #643A6E

UI roles & guardrails

In real applications

Scales

Every model

Export