What color is #4E37BD?

#4E37BD is a medium indigo. In RGB it is rgb(78, 55, 189), and in HSL hsl(250, 55%, 48%).

Is #4E37BD accessible as text?

On white, #4E37BD has a contrast ratio of 8.06:1 (passes WCAG AA for body text); on black it is 2.61:1 (fails). For text placed on #4E37BD, use white for the best readability.

What is the closest Tailwind color to #4E37BD?

The nearest Tailwind CSS token is indigo-700 (#432DD7).

What colors go well with #4E37BD?

#4E37BD pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #A7BE37. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #4E37BD below.

Is #4E37BD good for buttons?

#4E37BD works well for buttons and highlights, but use white text on #4E37BD — black text only reaches 2.61:1, below the 4.5:1 needed for normal-size labels.

Is #4E37BD the same as CSS rebeccapurple?

No — #4E37BD 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.

#4E37BD Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #4E37BD

Not just a swatch — here's how #4E37BD works with other colors. Named schemes with #4E37BD in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #4E37BD Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #6D63DB

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

Berry & Cream Lead · 5 colors

Lead #4E37BD Surface #F5E5D7 Anchor #5B2142 Accent #E5C2C9 Secondary #332B2F

Cerulean 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 #4E37BD Secondary #7779A6 Support #9D9088 Ink #18140F

Cerulean 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 Cerulean carrying the quiet middle.

Coastal Morning Lead · 5 colors

Lead #4E37BD Accent #A5C4C3 Surface #EAD5BF Secondary #9AA0A1 Anchor #22334A

Cerulean 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 #4E37BD Secondary #E86A70 Accent #F5934D Anchor #583B57 Surface #F7E7D7

Cerulean 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 #4E37BD 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 20/100

Cool

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

Softness 29/100

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 24/100

Low

Clean and current — no dusty, aged cast.

Luxury 55/100

Moderate

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

Brand distinctiveness 76/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 79/100

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 71/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #4E37BD

For UI

For branding

For interior

For fashion

People also use #4E37BD with

Glaucous Dark Orchid Peridot 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 8.1:1. Use

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

Avoid beside #7A37BE — 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 #4E37BD 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: #4E37BD;
  --color-base-rgb: 78 55 189;
  --color-base-oklch: oklch(45.2% 0.198 282.9);
  --color-50: #F4F3FC;
  --color-100: #E3DFF6;
  --color-200: #C7C0ED;
  --color-300: #A094DB;
  --color-400: #7B6BC7;
  --color-500: #5A4AAB;
  --color-600: #4A3F83;
  --color-700: #39315E;
  --color-800: #28233E;
  --color-900: #1A1726;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  cerulean: {
    50: '#F4F3FC',
    100: '#E3DFF6',
    200: '#C7C0ED',
    300: '#A094DB',
    400: '#7B6BC7',
    500: '#5A4AAB',
    600: '#4A3F83',
    700: '#39315E',
    800: '#28233E',
    900: '#1A1726',
  },
}

$base: #4E37BD;
$base-ink: #FFFFFF;
$base-50: #F4F3FC;
$base-100: #E3DFF6;
$base-200: #C7C0ED;
$base-300: #A094DB;
$base-400: #7B6BC7;
$base-500: #5A4AAB;
$base-600: #4A3F83;
$base-700: #39315E;
$base-800: #28233E;
$base-900: #1A1726;
$base-hover: #3E2C98;
$base-subtle: #CCC7E8;

{
    "color": {
        "base": {
            "value": "#4E37BD",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F3FC",
                "type": "color"
            },
            "100": {
                "value": "#E3DFF6",
                "type": "color"
            },
            "200": {
                "value": "#C7C0ED",
                "type": "color"
            },
            "300": {
                "value": "#A094DB",
                "type": "color"
            },
            "400": {
                "value": "#7B6BC7",
                "type": "color"
            },
            "500": {
                "value": "#5A4AAB",
                "type": "color"
            },
            "600": {
                "value": "#4A3F83",
                "type": "color"
            },
            "700": {
                "value": "#39315E",
                "type": "color"
            },
            "800": {
                "value": "#28233E",
                "type": "color"
            },
            "900": {
                "value": "#1A1726",
                "type": "color"
            }
        }
    }
}

Palettes built on #4E37BD

Color Lab

Pairs with #4E37BD

UI roles & guardrails

In real applications

Scales

Every model

Export