What color is #31339B?

#31339B is a medium blue-violet. In RGB it is rgb(49, 51, 155), and in HSL hsl(239, 52%, 40%).

Is #31339B accessible as text?

On white, #31339B has a contrast ratio of 10.11:1 (passes WCAG AA for body text); on black it is 2.08:1 (fails). For text placed on #31339B, use white for the best readability.

What is the closest Tailwind color to #31339B?

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

What colors go well with #31339B?

#31339B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #9B9931. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #31339B below.

Is #31339B good for buttons?

#31339B works well for buttons and highlights, but use white text on #31339B — black text only reaches 2.08:1, below the 4.5:1 needed for normal-size labels.

Is #31339B the same as CSS darkslateblue?

No — #31339B is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#31339B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #31339B

Not just a swatch — here's how #31339B works with other colors. Named schemes with #31339B in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #31339B Accent #A5C4C2 Surface #EAD5C0 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.

Tech Product Signal · 5 colors

Signal #31339B Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #505BBA

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.

Vintage Leather Lead · 5 colors

Lead #31339B Secondary #7F4535 Surface #EED7C2 Accent #365247 Anchor #582239

Egyptian Blue plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Berry & Cream Lead · 5 colors

Lead #31339B 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 #31339B Secondary #626A8E 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.

Build a working theme in the generator →

Color Lab

How #31339B 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 29/100

Low

Firm and assertive — carries weight and contrast.

Depth 64/100

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 30/100

Low

A faint retro warmth without tipping into sepia.

Luxury 63/100

High

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

Brand distinctiveness 45/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 70/100

High

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

Surface fit 15/100

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 #31339B

For UI

For branding

For interior

For fashion

People also use #31339B with

Steel Blue Rebecca Purple Moss Green 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 10.1:1. Use

Subtle surface Use #D5D5EC for cards and hover fills. Tint 80

Avoid beside #53319B — 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 #31339B 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: #31339B;
  --color-base-rgb: 49 51 155;
  --color-base-oklch: oklch(39.1% 0.165 274.9);
  --color-50: #F3F3FC;
  --color-100: #DFE0F6;
  --color-200: #C1C2EB;
  --color-300: #9697D9;
  --color-400: #6E6FC4;
  --color-500: #4D4EA8;
  --color-600: #414281;
  --color-700: #32335C;
  --color-800: #24243D;
  --color-900: #181826;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  egyptian-blue: {
    50: '#F3F3FC',
    100: '#DFE0F6',
    200: '#C1C2EB',
    300: '#9697D9',
    400: '#6E6FC4',
    500: '#4D4EA8',
    600: '#414281',
    700: '#32335C',
    800: '#24243D',
    900: '#181826',
  },
}

$base: #31339B;
$base-ink: #FFFFFF;
$base-50: #F3F3FC;
$base-100: #DFE0F6;
$base-200: #C1C2EB;
$base-300: #9697D9;
$base-400: #6E6FC4;
$base-500: #4D4EA8;
$base-600: #414281;
$base-700: #32335C;
$base-800: #24243D;
$base-900: #181826;
$base-hover: #27297C;
$base-subtle: #BFC0E3;

{
    "color": {
        "base": {
            "value": "#31339B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F3FC",
                "type": "color"
            },
            "100": {
                "value": "#DFE0F6",
                "type": "color"
            },
            "200": {
                "value": "#C1C2EB",
                "type": "color"
            },
            "300": {
                "value": "#9697D9",
                "type": "color"
            },
            "400": {
                "value": "#6E6FC4",
                "type": "color"
            },
            "500": {
                "value": "#4D4EA8",
                "type": "color"
            },
            "600": {
                "value": "#414281",
                "type": "color"
            },
            "700": {
                "value": "#32335C",
                "type": "color"
            },
            "800": {
                "value": "#24243D",
                "type": "color"
            },
            "900": {
                "value": "#181826",
                "type": "color"
            }
        }
    }
}

Palettes built on #31339B

Color Lab

Pairs with #31339B

UI roles & guardrails

In real applications

Scales

Every model

Export