What color is #3F31BC?

#3F31BC is a medium indigo. In RGB it is rgb(63, 49, 188), and in HSL hsl(246, 59%, 46%).

Is #3F31BC accessible as text?

On white, #3F31BC has a contrast ratio of 8.84:1 (passes WCAG AA for body text); on black it is 2.38:1 (fails). For text placed on #3F31BC, use white for the best readability.

What is the closest Tailwind color to #3F31BC?

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

What colors go well with #3F31BC?

#3F31BC pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #ADBB30. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #3F31BC below.

Is #3F31BC good for buttons?

#3F31BC works well for buttons and highlights, but use white text on #3F31BC — black text only reaches 2.38:1, below the 4.5:1 needed for normal-size labels.

Is #3F31BC the same as CSS darkslateblue?

No — #3F31BC is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#3F31BC Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3F31BC

Not just a swatch — here's how #3F31BC works with other colors. Named schemes with #3F31BC in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #3F31BC Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #5D5EDA

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

Berry & Cream Lead · 5 colors

Lead #3F31BC Surface #F6E5D8 Anchor #5B2142 Accent #E5C2C9 Secondary #322B2F

Egyptian Blue 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 #3F31BC Secondary #6D74A2 Support #9D9088 Ink #18140F

Egyptian Blue 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 Egyptian Blue carrying the quiet middle.

Coastal Morning Lead · 5 colors

Lead #3F31BC Accent #A5C4C2 Surface #EAD5BF Secondary #9AA0A1 Anchor #22344A

Egyptian Blue 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 #3F31BC Secondary #E86A71 Accent #F6934E Anchor #583B57 Surface #F7E7D7

Egyptian Blue 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 #3F31BC 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 16/100

Cool

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

Softness 27/100

Low

Firm and assertive — carries weight and contrast.

Depth 61/100

High

Mid depth — usable as an accent or a muted ground.

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 56/100

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 71/100

High

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

Surface fit 12/100

Very low

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

Print safety 68/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #3F31BC

For UI

For branding

For interior

For fashion

People also use #3F31BC with

Steel 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 8.8:1. Use

Subtle surface Use #DAD8EF for cards and hover fills. Tint 80

Avoid beside #6C30BB — 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 #3F31BC at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #3F31BC;
  --color-base-rgb: 63 49 188;
  --color-base-oklch: oklch(43.0% 0.206 277.8);
  --color-50: #F3F2FC;
  --color-100: #E0DEF7;
  --color-200: #C3BEEE;
  --color-300: #9992DE;
  --color-400: #7268CA;
  --color-500: #5146AE;
  --color-600: #443C86;
  --color-700: #34305F;
  --color-800: #25223F;
  --color-900: #181727;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  egyptian-blue: {
    50: '#F3F2FC',
    100: '#E0DEF7',
    200: '#C3BEEE',
    300: '#9992DE',
    400: '#7268CA',
    500: '#5146AE',
    600: '#443C86',
    700: '#34305F',
    800: '#25223F',
    900: '#181727',
  },
}

$base: #3F31BC;
$base-ink: #FFFFFF;
$base-50: #F3F2FC;
$base-100: #E0DEF7;
$base-200: #C3BEEE;
$base-300: #9992DE;
$base-400: #7268CA;
$base-500: #5146AE;
$base-600: #443C86;
$base-700: #34305F;
$base-800: #25223F;
$base-900: #181727;
$base-hover: #322695;
$base-subtle: #C7C3E8;

{
    "color": {
        "base": {
            "value": "#3F31BC",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F2FC",
                "type": "color"
            },
            "100": {
                "value": "#E0DEF7",
                "type": "color"
            },
            "200": {
                "value": "#C3BEEE",
                "type": "color"
            },
            "300": {
                "value": "#9992DE",
                "type": "color"
            },
            "400": {
                "value": "#7268CA",
                "type": "color"
            },
            "500": {
                "value": "#5146AE",
                "type": "color"
            },
            "600": {
                "value": "#443C86",
                "type": "color"
            },
            "700": {
                "value": "#34305F",
                "type": "color"
            },
            "800": {
                "value": "#25223F",
                "type": "color"
            },
            "900": {
                "value": "#181727",
                "type": "color"
            }
        }
    }
}

Palettes built on #3F31BC

Color Lab

Pairs with #3F31BC

UI roles & guardrails

In real applications

Scales

Every model

Export