What color is #644C8B?

#644C8B is a medium, muted violet. In RGB it is rgb(100, 76, 139), and in HSL hsl(263, 29%, 42%).

Is #644C8B accessible as text?

On white, #644C8B has a contrast ratio of 7.12:1 (passes WCAG AA for body text); on black it is 2.95:1 (fails). For text placed on #644C8B, use white for the best readability.

What is the closest Tailwind color to #644C8B?

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

What colors go well with #644C8B?

#644C8B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #728A4C. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #644C8B below.

Is #644C8B good for buttons?

#644C8B works well for buttons and highlights, but use white text on #644C8B — black text only reaches 2.95:1, below the 4.5:1 needed for normal-size labels.

Is #644C8B the same as CSS rebeccapurple?

No — #644C8B is not the CSS named color rebeccapurple, but rebeccapurple (#663399) is the closest CSS named color.

#644C8B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #644C8B

Not just a swatch — here's how #644C8B works with other colors. Named schemes with #644C8B in its natural role, and a note on why the supporting colors balance it.

Berry & Cream Lead · 5 colors

Lead #644C8B Surface #F5E6D7 Anchor #5C2140 Accent #E5C2C7 Secondary #332B2F

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

Coastal Morning Lead · 5 colors

Lead #644C8B Accent #A5C4C4 Surface #E9D6BF Secondary #9AA0A1 Anchor #23334B

Ultra Violet 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 #644C8B Secondary #7E4631 Surface #EDD8C1 Accent #355248 Anchor #592237

Ultra Violet 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 #644C8B Anchor #3B2923 Surface #F2E1D1 Accent #739F7E Secondary #3C3734

Ultra Violet 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 #644C8B Secondary #867F96 Support #9C9088 Ink #18140F

Ultra Violet 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 Ultra Violet carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #644C8B 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 40/100

Neutral

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

Softness 40/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 53/100

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 60/100

Moderate

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

Luxury 60/100

Moderate

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

Brand distinctiveness 28/100

Low

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

UI accent fit 88/100

Very high

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

Surface fit 23/100

Low

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

Print safety 87/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #644C8B

For UI

For branding

For interior

For fashion

People also use #644C8B with

Very Peri Plum Olive Green Gainsboro Onyx

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 7.1:1. Use

Subtle surface Use #E0DBE8 for cards and hover fills. Tint 80

Avoid beside #794C8A — 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 #644C8B 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: #644C8B;
  --color-base-rgb: 100 76 139;
  --color-base-oklch: oklch(47.0% 0.102 300.1);
  --color-50: #F7F5FA;
  --color-100: #E9E4F1;
  --color-200: #D3CAE2;
  --color-300: #B3A5CA;
  --color-400: #9381B1;
  --color-500: #746194;
  --color-600: #5D4F73;
  --color-700: #453C53;
  --color-800: #2F2937;
  --color-900: #1E1B23;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  ultra-violet: {
    50: '#F7F5FA',
    100: '#E9E4F1',
    200: '#D3CAE2',
    300: '#B3A5CA',
    400: '#9381B1',
    500: '#746194',
    600: '#5D4F73',
    700: '#453C53',
    800: '#2F2937',
    900: '#1E1B23',
  },
}

$base: #644C8B;
$base-ink: #FFFFFF;
$base-50: #F7F5FA;
$base-100: #E9E4F1;
$base-200: #D3CAE2;
$base-300: #B3A5CA;
$base-400: #9381B1;
$base-500: #746194;
$base-600: #5D4F73;
$base-700: #453C53;
$base-800: #2F2937;
$base-900: #1E1B23;
$base-hover: #503D6F;
$base-subtle: #D0C9DC;

{
    "color": {
        "base": {
            "value": "#644C8B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F7F5FA",
                "type": "color"
            },
            "100": {
                "value": "#E9E4F1",
                "type": "color"
            },
            "200": {
                "value": "#D3CAE2",
                "type": "color"
            },
            "300": {
                "value": "#B3A5CA",
                "type": "color"
            },
            "400": {
                "value": "#9381B1",
                "type": "color"
            },
            "500": {
                "value": "#746194",
                "type": "color"
            },
            "600": {
                "value": "#5D4F73",
                "type": "color"
            },
            "700": {
                "value": "#453C53",
                "type": "color"
            },
            "800": {
                "value": "#2F2937",
                "type": "color"
            },
            "900": {
                "value": "#1E1B23",
                "type": "color"
            }
        }
    }
}

Palettes built on #644C8B

Color Lab

Pairs with #644C8B

UI roles & guardrails

In real applications

Scales

Every model

Export