What color is #4E37B3?

#4E37B3 is a medium indigo. In RGB it is rgb(78, 55, 179), and in HSL hsl(251, 53%, 46%).

Is #4E37B3 accessible as text?

On white, #4E37B3 has a contrast ratio of 8.33:1 (passes WCAG AA for body text); on black it is 2.52:1 (fails). For text placed on #4E37B3, use white for the best readability.

What is the closest Tailwind color to #4E37B3?

The nearest Tailwind CSS token is indigo-800 (#372AAC).

What colors go well with #4E37B3?

#4E37B3 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #9DB337. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #4E37B3 below.

Is #4E37B3 good for buttons?

#4E37B3 works well for buttons and highlights, but use white text on #4E37B3 — black text only reaches 2.52:1, below the 4.5:1 needed for normal-size labels.

Is #4E37B3 the same as CSS rebeccapurple?

No — #4E37B3 is not the CSS named color rebeccapurple, but rebeccapurple (#663399) 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.

#4E37B3 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #4E37B3

Not just a swatch — here's how #4E37B3 works with other colors. Named schemes with #4E37B3 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #4E37B3 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #6D61D2

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.

Berry & Cream Lead · 5 colors

Lead #4E37B3 Surface #F5E5D7 Anchor #5B2142 Accent #E5C2C8 Secondary #332B2F

Rebecca Purple 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 #4E37B3 Secondary #7676A1 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 #4E37B3 Accent #A5C4C3 Surface #EAD5BF Secondary #9AA0A1 Anchor #22334A

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 #4E37B3 Secondary #E86A70 Accent #F5934C Anchor #583B57 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 #4E37B3 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 21/100

Cool

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

Softness 30/100

Low

Firm and assertive — carries weight and contrast.

Depth 59/100

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 27/100

Low

A faint retro warmth without tipping into sepia.

Luxury 57/100

Moderate

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

Brand distinctiveness 72/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 81/100

Very high

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

Surface fit 11/100

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 #4E37B3

For UI

For branding

For interior

For fashion

People also use #4E37B3 with

Steel Blue Dark Orchid Citron Gainsboro Prussian Blue

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 8.3:1. Use

Subtle surface Use #DDD9EE for cards and hover fills. Tint 80

Avoid beside #7737B3 — 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 #4E37B3 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: #4E37B3;
  --color-base-rgb: 78 55 179;
  --color-base-oklch: oklch(44.2% 0.186 284.4);
  --color-50: #F5F3FC;
  --color-100: #E3DFF6;
  --color-200: #C9C1EC;
  --color-300: #A295DA;
  --color-400: #7D6DC5;
  --color-500: #5D4CA9;
  --color-600: #4C4082;
  --color-700: #3A325D;
  --color-800: #28243D;
  --color-900: #1A1726;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  rebecca-purple: {
    50: '#F5F3FC',
    100: '#E3DFF6',
    200: '#C9C1EC',
    300: '#A295DA',
    400: '#7D6DC5',
    500: '#5D4CA9',
    600: '#4C4082',
    700: '#3A325D',
    800: '#28243D',
    900: '#1A1726',
  },
}

$base: #4E37B3;
$base-ink: #FFFFFF;
$base-50: #F5F3FC;
$base-100: #E3DFF6;
$base-200: #C9C1EC;
$base-300: #A295DA;
$base-400: #7D6DC5;
$base-500: #5D4CA9;
$base-600: #4C4082;
$base-700: #3A325D;
$base-800: #28243D;
$base-900: #1A1726;
$base-hover: #3E2C90;
$base-subtle: #CBC5E6;

{
    "color": {
        "base": {
            "value": "#4E37B3",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F3FC",
                "type": "color"
            },
            "100": {
                "value": "#E3DFF6",
                "type": "color"
            },
            "200": {
                "value": "#C9C1EC",
                "type": "color"
            },
            "300": {
                "value": "#A295DA",
                "type": "color"
            },
            "400": {
                "value": "#7D6DC5",
                "type": "color"
            },
            "500": {
                "value": "#5D4CA9",
                "type": "color"
            },
            "600": {
                "value": "#4C4082",
                "type": "color"
            },
            "700": {
                "value": "#3A325D",
                "type": "color"
            },
            "800": {
                "value": "#28243D",
                "type": "color"
            },
            "900": {
                "value": "#1A1726",
                "type": "color"
            }
        }
    }
}