What color is #4D3FBC?

#4D3FBC is a medium indigo. In RGB it is rgb(77, 63, 188), and in HSL hsl(247, 50%, 49%).

Is #4D3FBC accessible as text?

On white, #4D3FBC has a contrast ratio of 7.63:1 (passes WCAG AA for body text); on black it is 2.75:1 (fails). For text placed on #4D3FBC, use white for the best readability.

What is the closest Tailwind color to #4D3FBC?

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

What colors go well with #4D3FBC?

#4D3FBC pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #ADBB3E. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #4D3FBC below.

Is #4D3FBC good for buttons?

#4D3FBC works well for buttons and highlights, but use white text on #4D3FBC — black text only reaches 2.75:1, below the 4.5:1 needed for normal-size labels.

Is #4D3FBC the same as CSS rebeccapurple?

No — #4D3FBC 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.

#4D3FBC Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #4D3FBC

Not just a swatch — here's how #4D3FBC works with other colors. Named schemes with #4D3FBC in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #4D3FBC Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #6D69DB

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 #4D3FBC Surface #F5E5D8 Anchor #5B2142 Accent #E5C2C9 Secondary #322B2F

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 #4D3FBC Secondary #797CA8 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 #4D3FBC 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 #4D3FBC 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 #4D3FBC 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 19/100

Cool

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

Softness 31/100

Low

Firm and assertive — carries weight and contrast.

Depth 57/100

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 55/100

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 84/100

Very high

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

Surface fit 10/100

Very low

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

Print safety 72/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #4D3FBC

For UI

For branding

For interior

For fashion

People also use #4D3FBC with

Ocean Blue 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 7.6:1. Use

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

Avoid beside #773EBB — 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 #4D3FBC 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: #4D3FBC;
  --color-base-rgb: 77 63 188;
  --color-base-oklch: oklch(46.2% 0.188 281.2);
  --color-50: #F4F3FC;
  --color-100: #E2E0F5;
  --color-200: #C7C2EB;
  --color-300: #9F97D8;
  --color-400: #7970C2;
  --color-500: #594EA6;
  --color-600: #494280;
  --color-700: #38335C;
  --color-800: #27243C;
  --color-900: #191825;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  cerulean: {
    50: '#F4F3FC',
    100: '#E2E0F5',
    200: '#C7C2EB',
    300: '#9F97D8',
    400: '#7970C2',
    500: '#594EA6',
    600: '#494280',
    700: '#38335C',
    800: '#27243C',
    900: '#191825',
  },
}

$base: #4D3FBC;
$base-ink: #FFFFFF;
$base-50: #F4F3FC;
$base-100: #E2E0F5;
$base-200: #C7C2EB;
$base-300: #9F97D8;
$base-400: #7970C2;
$base-500: #594EA6;
$base-600: #494280;
$base-700: #38335C;
$base-800: #27243C;
$base-900: #191825;
$base-hover: #3E3296;
$base-subtle: #CDC9E7;

{
    "color": {
        "base": {
            "value": "#4D3FBC",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F3FC",
                "type": "color"
            },
            "100": {
                "value": "#E2E0F5",
                "type": "color"
            },
            "200": {
                "value": "#C7C2EB",
                "type": "color"
            },
            "300": {
                "value": "#9F97D8",
                "type": "color"
            },
            "400": {
                "value": "#7970C2",
                "type": "color"
            },
            "500": {
                "value": "#594EA6",
                "type": "color"
            },
            "600": {
                "value": "#494280",
                "type": "color"
            },
            "700": {
                "value": "#38335C",
                "type": "color"
            },
            "800": {
                "value": "#27243C",
                "type": "color"
            },
            "900": {
                "value": "#191825",
                "type": "color"
            }
        }
    }
}