What color is #331FB1?

#331FB1 is a medium, vivid indigo. In RGB it is rgb(51, 31, 177), and in HSL hsl(248, 70%, 41%).

Is #331FB1 accessible as text?

On white, #331FB1 has a contrast ratio of 10.65:1 (passes WCAG AA for body text); on black it is 1.97:1 (fails). For text placed on #331FB1, use white for the best readability.

What is the closest Tailwind color to #331FB1?

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

What colors go well with #331FB1?

#331FB1 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #9EB21F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #331FB1 below.

Is #331FB1 good for buttons?

#331FB1 works well for buttons and highlights, but use white text on #331FB1 — black text only reaches 1.97:1, below the 4.5:1 needed for normal-size labels.

Is #331FB1 the same as CSS mediumblue?

No — #331FB1 is not the CSS named color mediumblue, but mediumblue (#0000CD) is the closest CSS named color.

#331FB1 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #331FB1

Not just a swatch — here's how #331FB1 works with other colors. Named schemes with #331FB1 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #331FB1 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #4E51CF

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 #331FB1 Surface #F6E5D8 Anchor #5B2143 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 #331FB1 Secondary #606796 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 #331FB1 Accent #A5C4C2 Surface #EAD5BF Secondary #9AA0A1 Anchor #21344A

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 #331FB1 Secondary #E86A72 Accent #F6924E 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.

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Color Lab

How #331FB1 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 15/100

Cool

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

Softness 24/100

Low

Firm and assertive — carries weight and contrast.

Depth 66/100

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 17/100

Very low

Clean and current — no dusty, aged cast.

Luxury 59/100

Moderate

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

Brand distinctiveness 82/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 58/100

Moderate

Workable accent with care around contrast.

Surface fit 15/100

Very low

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

Print safety 67/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #331FB1

For UI

For branding

For interior

For fashion

People also use #331FB1 with

True Blue Mauveine 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 10.7:1. Use

Subtle surface Use #D6D2F0 for cards and hover fills. Tint 80

Avoid beside #641FB2 — 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 #331FB1 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: #331FB1;
  --color-base-rgb: 51 31 177;
  --color-base-oklch: oklch(38.8% 0.211 276.3);
  --color-50: #F3F1FD;
  --color-100: #E0DBFA;
  --color-200: #C1BAF3;
  --color-300: #968AE5;
  --color-400: #6F5FD3;
  --color-500: #4D3DB8;
  --color-600: #41358C;
  --color-700: #332B64;
  --color-800: #242041;
  --color-900: #181528;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  egyptian-blue: {
    50: '#F3F1FD',
    100: '#E0DBFA',
    200: '#C1BAF3',
    300: '#968AE5',
    400: '#6F5FD3',
    500: '#4D3DB8',
    600: '#41358C',
    700: '#332B64',
    800: '#242041',
    900: '#181528',
  },
}

$base: #331FB1;
$base-ink: #FFFFFF;
$base-50: #F3F1FD;
$base-100: #E0DBFA;
$base-200: #C1BAF3;
$base-300: #968AE5;
$base-400: #6F5FD3;
$base-500: #4D3DB8;
$base-600: #41358C;
$base-700: #332B64;
$base-800: #242041;
$base-900: #181528;
$base-hover: #29198E;
$base-subtle: #C0BAEA;

{
    "color": {
        "base": {
            "value": "#331FB1",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F1FD",
                "type": "color"
            },
            "100": {
                "value": "#E0DBFA",
                "type": "color"
            },
            "200": {
                "value": "#C1BAF3",
                "type": "color"
            },
            "300": {
                "value": "#968AE5",
                "type": "color"
            },
            "400": {
                "value": "#6F5FD3",
                "type": "color"
            },
            "500": {
                "value": "#4D3DB8",
                "type": "color"
            },
            "600": {
                "value": "#41358C",
                "type": "color"
            },
            "700": {
                "value": "#332B64",
                "type": "color"
            },
            "800": {
                "value": "#242041",
                "type": "color"
            },
            "900": {
                "value": "#181528",
                "type": "color"
            }
        }
    }
}

Palettes built on #331FB1

Color Lab

Pairs with #331FB1

UI roles & guardrails

In real applications

Scales

Every model

Export