What color is #31389B?

#31389B is a medium blue-violet. In RGB it is rgb(49, 56, 155), and in HSL hsl(236, 52%, 40%).

Is #31389B accessible as text?

On white, #31389B has a contrast ratio of 9.68:1 (passes WCAG AA for body text); on black it is 2.17:1 (fails). For text placed on #31389B, use white for the best readability.

What is the closest Tailwind color to #31389B?

The nearest Tailwind CSS token is blue-900 (#1C398E).

What colors go well with #31389B?

#31389B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #9B9431. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #31389B below.

Is #31389B good for buttons?

#31389B works well for buttons and highlights, but use white text on #31389B — black text only reaches 2.17:1, below the 4.5:1 needed for normal-size labels.

Is #31389B the same as CSS darkslateblue?

No — #31389B is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#31389B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #31389B

Not just a swatch — here's how #31389B works with other colors. Named schemes with #31389B in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #31389B 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 #31389B Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #515FBA

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 #31389B 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 #31389B 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 #31389B Secondary #646D90 Support #9D8F88 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 #31389B 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 30/100

Low

Firm and assertive — carries weight and contrast.

Depth 62/100

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 32/100

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 43/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 74/100

High

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

Surface fit 14/100

Very low

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

Print safety 74/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #31389B

For UI

For branding

For interior

For fashion

People also use #31389B with

Ocean 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 9.7:1. Use

Subtle surface Use #D5D6EC for cards and hover fills. Tint 80

Avoid beside #4D319B — 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 #31389B 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: #31389B;
  --color-base-rgb: 49 56 155;
  --color-base-oklch: oklch(40.0% 0.159 273.6);
  --color-50: #F3F4FC;
  --color-100: #DFE1F6;
  --color-200: #C1C4EB;
  --color-300: #969BD9;
  --color-400: #6E74C4;
  --color-500: #4D53A8;
  --color-600: #414581;
  --color-700: #32355C;
  --color-800: #24263D;
  --color-900: #181926;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  egyptian-blue: {
    50: '#F3F4FC',
    100: '#DFE1F6',
    200: '#C1C4EB',
    300: '#969BD9',
    400: '#6E74C4',
    500: '#4D53A8',
    600: '#414581',
    700: '#32355C',
    800: '#24263D',
    900: '#181926',
  },
}

$base: #31389B;
$base-ink: #FFFFFF;
$base-50: #F3F4FC;
$base-100: #DFE1F6;
$base-200: #C1C4EB;
$base-300: #969BD9;
$base-400: #6E74C4;
$base-500: #4D53A8;
$base-600: #414581;
$base-700: #32355C;
$base-800: #24263D;
$base-900: #181926;
$base-hover: #272D7C;
$base-subtle: #BFC1E3;

{
    "color": {
        "base": {
            "value": "#31389B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F4FC",
                "type": "color"
            },
            "100": {
                "value": "#DFE1F6",
                "type": "color"
            },
            "200": {
                "value": "#C1C4EB",
                "type": "color"
            },
            "300": {
                "value": "#969BD9",
                "type": "color"
            },
            "400": {
                "value": "#6E74C4",
                "type": "color"
            },
            "500": {
                "value": "#4D53A8",
                "type": "color"
            },
            "600": {
                "value": "#414581",
                "type": "color"
            },
            "700": {
                "value": "#32355C",
                "type": "color"
            },
            "800": {
                "value": "#24263D",
                "type": "color"
            },
            "900": {
                "value": "#181926",
                "type": "color"
            }
        }
    }
}

Palettes built on #31389B

Color Lab

Pairs with #31389B

UI roles & guardrails

In real applications

Scales

Every model

Export