What color is #511D81?

#511D81 is a dark violet. In RGB it is rgb(81, 29, 129), and in HSL hsl(271, 63%, 31%).

Is #511D81 accessible as text?

On white, #511D81 has a contrast ratio of 11.40:1 (passes WCAG AA for body text); on black it is 1.84:1 (fails). For text placed on #511D81, use white for the best readability.

What is the closest Tailwind color to #511D81?

The nearest Tailwind CSS token is purple-900 (#59168B).

What colors go well with #511D81?

#511D81 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #4D811D. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #511D81 below.

Is #511D81 good for buttons?

#511D81 works well for buttons and highlights, but use white text on #511D81 — black text only reaches 1.84:1, below the 4.5:1 needed for normal-size labels.

Is #511D81 the same as CSS indigo?

No — #511D81 is not the CSS named color indigo, but indigo (#4B0082) is the closest CSS named color.

#511D81 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #511D81

Not just a swatch — here's how #511D81 works with other colors. Named schemes with #511D81 in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #511D81 Anchor #141210 Accent #D99855 Secondary #2B2731 Surface #F3ECE3

Indigo carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Moody Editorial Color · 5 colors

Color #511D81 Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DA Accent #370440

Indigo adds the colour to this moody editorial scheme — charcoal and a mid-grey around it, a bone highlight, and a muted jewel accent drawn from Indigo.

Coastal Morning Lead · 5 colors

Lead #511D81 Accent #A5C4C4 Surface #E9D6BF Secondary #9AA0A1 Anchor #23334B

Indigo opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Berry & Cream Lead · 5 colors

Lead #511D81 Surface #F5E6D7 Anchor #5C2140 Accent #E5C2C7 Secondary #332B2F

Indigo 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 #511D81 Secondary #6B5E80 Support #9C9088 Ink #18140F

Indigo 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 Indigo carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #511D81 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 36/100

Cool

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

Softness 28/100

Low

Firm and assertive — carries weight and contrast.

Depth 66/100

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 34/100

Low

A faint retro warmth without tipping into sepia.

Luxury 65/100

High

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

Brand distinctiveness 61/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 63/100

High

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

Surface fit 16/100

Very low

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

Print safety 81/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #511D81

For UI

For branding

For interior

For fashion

People also use #511D81 with

Egyptian Blue Purple Avocado 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 11.4:1. Use

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

Avoid beside #721D81 — 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 #511D81 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: #511D81;
  --color-base-rgb: 81 29 129;
  --color-base-oklch: oklch(36.7% 0.157 302.9);
  --color-50: #F8F2FD;
  --color-100: #EBDDF8;
  --color-200: #D7BDF0;
  --color-300: #B98FE0;
  --color-400: #9B65CD;
  --color-500: #7C43B2;
  --color-600: #623A88;
  --color-700: #482E61;
  --color-800: #312140;
  --color-900: #1F1627;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  indigo: {
    50: '#F8F2FD',
    100: '#EBDDF8',
    200: '#D7BDF0',
    300: '#B98FE0',
    400: '#9B65CD',
    500: '#7C43B2',
    600: '#623A88',
    700: '#482E61',
    800: '#312140',
    900: '#1F1627',
  },
}

$base: #511D81;
$base-ink: #FFFFFF;
$base-50: #F8F2FD;
$base-100: #EBDDF8;
$base-200: #D7BDF0;
$base-300: #B98FE0;
$base-400: #9B65CD;
$base-500: #7C43B2;
$base-600: #623A88;
$base-700: #482E61;
$base-800: #312140;
$base-900: #1F1627;
$base-hover: #411767;
$base-subtle: #CBB1E3;

{
    "color": {
        "base": {
            "value": "#511D81",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F8F2FD",
                "type": "color"
            },
            "100": {
                "value": "#EBDDF8",
                "type": "color"
            },
            "200": {
                "value": "#D7BDF0",
                "type": "color"
            },
            "300": {
                "value": "#B98FE0",
                "type": "color"
            },
            "400": {
                "value": "#9B65CD",
                "type": "color"
            },
            "500": {
                "value": "#7C43B2",
                "type": "color"
            },
            "600": {
                "value": "#623A88",
                "type": "color"
            },
            "700": {
                "value": "#482E61",
                "type": "color"
            },
            "800": {
                "value": "#312140",
                "type": "color"
            },
            "900": {
                "value": "#1F1627",
                "type": "color"
            }
        }
    }
}

Palettes built on #511D81

Color Lab

Pairs with #511D81

UI roles & guardrails

In real applications

Scales

Every model

Export