What color is #540DA4?

#540DA4 is a dark, vivid violet. In RGB it is rgb(84, 13, 164), and in HSL hsl(268, 85%, 35%).

Is #540DA4 accessible as text?

On white, #540DA4 has a contrast ratio of 10.66:1 (passes WCAG AA for body text); on black it is 1.97:1 (fails). For text placed on #540DA4, use white for the best readability.

What is the closest Tailwind color to #540DA4?

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

What colors go well with #540DA4?

#540DA4 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #5EA50D. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #540DA4 below.

Is #540DA4 good for buttons?

#540DA4 works well for buttons and highlights, but use white text on #540DA4 — black text only reaches 1.97:1, below the 4.5:1 needed for normal-size labels.

Is #540DA4 the same as CSS indigo?

No — #540DA4 is not the CSS named color indigo, but indigo (#4B0082) is the closest CSS named color.

#540DA4 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #540DA4

Not just a swatch — here's how #540DA4 works with other colors. Named schemes with #540DA4 in its natural role, and a note on why the supporting colors balance it.

Berry & Cream Lead · 5 colors

Lead #540DA4 Surface #F5E5D7 Anchor #5C2141 Accent #E5C2C8 Secondary #332B2F

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

Tech Product Signal · 5 colors

Signal #540DA4 Surface #14161A Highlight #F4F6F8 Secondary #5B6572 Accent #7246C3

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #540DA4 Secondary #6F6492 Support #9D9088 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.

Coastal Morning Lead · 5 colors

Lead #540DA4 Accent #A5C4C3 Surface #E9D6BF Secondary #9AA0A1 Anchor #23334A

Indigo 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 #540DA4 Secondary #E86B6D Accent #F4944A Anchor #583B56 Surface #F7E7D7

Indigo 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 #540DA4 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 29/100

Cool

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

Softness 25/100

Low

Firm and assertive — carries weight and contrast.

Depth 65/100

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 20/100

Low

Clean and current — no dusty, aged cast.

Luxury 59/100

Moderate

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

Brand distinctiveness 79/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 61/100

High

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

Surface fit 15/100

Very low

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

Print safety 73/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #540DA4

For UI

For branding

For interior

For fashion

People also use #540DA4 with

Medium Blue Mauveine Olive Drab 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 10.7:1. Use

Subtle surface Use #DCCAF2 for cards and hover fills. Tint 80

Avoid beside #870DA5 — 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 #540DA4 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: #540DA4;
  --color-base-rgb: 84 13 164;
  --color-base-oklch: oklch(39.2% 0.205 295.3);
  --color-50: #F7F0FE;
  --color-100: #E9D8FD;
  --color-200: #D4B4F9;
  --color-300: #B481EE;
  --color-400: #9453DF;
  --color-500: #7530C5;
  --color-600: #5D2C96;
  --color-700: #45256A;
  --color-800: #2F1C45;
  --color-900: #1E132A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  indigo: {
    50: '#F7F0FE',
    100: '#E9D8FD',
    200: '#D4B4F9',
    300: '#B481EE',
    400: '#9453DF',
    500: '#7530C5',
    600: '#5D2C96',
    700: '#45256A',
    800: '#2F1C45',
    900: '#1E132A',
  },
}

$base: #540DA4;
$base-ink: #FFFFFF;
$base-50: #F7F0FE;
$base-100: #E9D8FD;
$base-200: #D4B4F9;
$base-300: #B481EE;
$base-400: #9453DF;
$base-500: #7530C5;
$base-600: #5D2C96;
$base-700: #45256A;
$base-800: #2F1C45;
$base-900: #1E132A;
$base-hover: #430B84;
$base-subtle: #CBADED;

{
    "color": {
        "base": {
            "value": "#540DA4",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F7F0FE",
                "type": "color"
            },
            "100": {
                "value": "#E9D8FD",
                "type": "color"
            },
            "200": {
                "value": "#D4B4F9",
                "type": "color"
            },
            "300": {
                "value": "#B481EE",
                "type": "color"
            },
            "400": {
                "value": "#9453DF",
                "type": "color"
            },
            "500": {
                "value": "#7530C5",
                "type": "color"
            },
            "600": {
                "value": "#5D2C96",
                "type": "color"
            },
            "700": {
                "value": "#45256A",
                "type": "color"
            },
            "800": {
                "value": "#2F1C45",
                "type": "color"
            },
            "900": {
                "value": "#1E132A",
                "type": "color"
            }
        }
    }
}

Palettes built on #540DA4

Color Lab

Pairs with #540DA4

UI roles & guardrails

In real applications

Scales

Every model

Export