What color is #511BA1?

#511BA1 is a dark, vivid violet. In RGB it is rgb(81, 27, 161), and in HSL hsl(264, 71%, 37%).

Is #511BA1 accessible as text?

On white, #511BA1 has a contrast ratio of 10.39:1 (passes WCAG AA for body text); on black it is 2.02:1 (fails). For text placed on #511BA1, use white for the best readability.

What is the closest Tailwind color to #511BA1?

The nearest Tailwind CSS token is violet-900 (#4D179A).

What colors go well with #511BA1?

#511BA1 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #6CA11B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #511BA1 below.

Is #511BA1 good for buttons?

#511BA1 works well for buttons and highlights, but use white text on #511BA1 — black text only reaches 2.02:1, below the 4.5:1 needed for normal-size labels.

Is #511BA1 the same as CSS rebeccapurple?

No — #511BA1 is not the CSS named color rebeccapurple, but rebeccapurple (#663399) is the closest CSS named color.

#511BA1 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #511BA1

Not just a swatch — here's how #511BA1 works with other colors. Named schemes with #511BA1 in its natural role, and a note on why the supporting colors balance it.

Berry & Cream Lead · 5 colors

Lead #511BA1 Surface #F5E5D7 Anchor #5C2141 Accent #E5C2C8 Secondary #332B2F

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

Tech Product Signal · 5 colors

Signal #511BA1 Surface #14161A Highlight #F4F6F8 Secondary #5B6572 Accent #6F4CC0

Rebecca 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 Rebecca Purple.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #511BA1 Secondary #6F6691 Support #9D9088 Ink #18140F

Rebecca 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 Rebecca Purple carrying the quiet middle.

Coastal Morning Lead · 5 colors

Lead #511BA1 Accent #A5C4C3 Surface #E9D6BF Secondary #9AA0A1 Anchor #23334A

Rebecca 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 #511BA1 Secondary #E86B6D Accent #F4944A Anchor #583B56 Surface #F7E7D7

Rebecca 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 #511BA1 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 26/100

Low

Firm and assertive — carries weight and contrast.

Depth 64/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 24/100

Low

Clean and current — no dusty, aged cast.

Luxury 60/100

High

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

Brand distinctiveness 75/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 65/100

High

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

Surface fit 14/100

Very low

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

Print safety 75/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #511BA1

For UI

For branding

For interior

For fashion

People also use #511BA1 with

Cobalt Blue Mauveine Olive Drab 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 10.4:1. Use

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

Avoid beside #7E1BA1 — 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 #511BA1 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: #511BA1;
  --color-base-rgb: 81 27 161;
  --color-base-oklch: oklch(39.5% 0.193 293.5);
  --color-50: #F6F1FD;
  --color-100: #E8DBFA;
  --color-200: #D0B9F3;
  --color-300: #AE8AE5;
  --color-400: #8D5ED4;
  --color-500: #6E3CB9;
  --color-600: #58358D;
  --color-700: #422B64;
  --color-800: #2D1F42;
  --color-900: #1D1528;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  rebecca-purple: {
    50: '#F6F1FD',
    100: '#E8DBFA',
    200: '#D0B9F3',
    300: '#AE8AE5',
    400: '#8D5ED4',
    500: '#6E3CB9',
    600: '#58358D',
    700: '#422B64',
    800: '#2D1F42',
    900: '#1D1528',
  },
}

$base: #511BA1;
$base-ink: #FFFFFF;
$base-50: #F6F1FD;
$base-100: #E8DBFA;
$base-200: #D0B9F3;
$base-300: #AE8AE5;
$base-400: #8D5ED4;
$base-500: #6E3CB9;
$base-600: #58358D;
$base-700: #422B64;
$base-800: #2D1F42;
$base-900: #1D1528;
$base-hover: #411681;
$base-subtle: #CAB5E9;

{
    "color": {
        "base": {
            "value": "#511BA1",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F6F1FD",
                "type": "color"
            },
            "100": {
                "value": "#E8DBFA",
                "type": "color"
            },
            "200": {
                "value": "#D0B9F3",
                "type": "color"
            },
            "300": {
                "value": "#AE8AE5",
                "type": "color"
            },
            "400": {
                "value": "#8D5ED4",
                "type": "color"
            },
            "500": {
                "value": "#6E3CB9",
                "type": "color"
            },
            "600": {
                "value": "#58358D",
                "type": "color"
            },
            "700": {
                "value": "#422B64",
                "type": "color"
            },
            "800": {
                "value": "#2D1F42",
                "type": "color"
            },
            "900": {
                "value": "#1D1528",
                "type": "color"
            }
        }
    }
}

Palettes built on #511BA1

Color Lab

Pairs with #511BA1

UI roles & guardrails

In real applications

Scales

Every model

Export