What color is #331B70?

#331B70 is a dark indigo. In RGB it is rgb(51, 27, 112), and in HSL hsl(257, 61%, 27%).

Is #331B70 accessible as text?

On white, #331B70 has a contrast ratio of 13.71:1 (passes WCAG AA for body text); on black it is 1.53:1 (fails). For text placed on #331B70, use white for the best readability.

What is the closest Tailwind color to #331B70?

The nearest Tailwind CSS token is violet-950 (#2F0D68).

What colors go well with #331B70?

#331B70 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #576F1B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #331B70 below.

Is #331B70 good for buttons?

#331B70 works well for buttons and highlights, but use white text on #331B70 — black text only reaches 1.53:1, below the 4.5:1 needed for normal-size labels.

Is #331B70 the same as CSS midnightblue?

No — #331B70 is not the CSS named color midnightblue, but midnightblue (#191970) 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.

#331B70 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #331B70

Not just a swatch — here's how #331B70 works with other colors. Named schemes with #331B70 in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #331B70 Anchor #141210 Accent #DB9757 Secondary #282732 Surface #F3ECE3

Midnight Blue carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Moody Editorial Color · 5 colors

Color #331B70 Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DA Accent #200135

Midnight Blue adds the colour to this moody editorial scheme — charcoal and a mid-grey around it, a bone highlight, and a muted jewel accent drawn from Midnight Blue.

Coastal Morning Lead · 5 colors

Lead #331B70 Accent #A5C4C3 Surface #E9D6BF Secondary #9AA0A1 Anchor #22334A

Midnight Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Vintage Leather Lead · 5 colors

Lead #331B70 Secondary #7E4633 Surface #EDD8C2 Accent #355248 Anchor #582238

Midnight 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.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #331B70 Secondary #555270 Support #9D9088 Ink #18140F

Midnight 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 Midnight Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #331B70 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 29/100

Cool

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

Softness 25/100

Low

Firm and assertive — carries weight and contrast.

Depth 70/100

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 33/100

Low

A faint retro warmth without tipping into sepia.

Luxury 72/100

High

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

Brand distinctiveness 53/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 44/100

Moderate

Workable accent with care around contrast.

Surface fit 23/100

Low

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

Print safety 81/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #331B70

For UI

For branding

For interior

For fashion

People also use #331B70 with

Classic Blue Byzantium Dark Olive Green Gainsboro Russian Violet

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 13.7:1. Use

Subtle surface Use #D3C9EA for cards and hover fills. Tint 80

Avoid beside #4F1B6F — 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 #331B70 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: #331B70;
  --color-base-rgb: 51 27 112;
  --color-base-oklch: oklch(31.3% 0.137 288.9);
  --color-50: #F5F2FC;
  --color-100: #E5DDF8;
  --color-200: #CBBDEF;
  --color-300: #A790DF;
  --color-400: #8367CB;
  --color-500: #6345B0;
  --color-600: #503B87;
  --color-700: #3D2F60;
  --color-800: #2A223F;
  --color-900: #1B1627;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  midnight-blue: {
    50: '#F5F2FC',
    100: '#E5DDF8',
    200: '#CBBDEF',
    300: '#A790DF',
    400: '#8367CB',
    500: '#6345B0',
    600: '#503B87',
    700: '#3D2F60',
    800: '#2A223F',
    900: '#1B1627',
  },
}

$base: #331B70;
$base-ink: #FFFFFF;
$base-50: #F5F2FC;
$base-100: #E5DDF8;
$base-200: #CBBDEF;
$base-300: #A790DF;
$base-400: #8367CB;
$base-500: #6345B0;
$base-600: #503B87;
$base-700: #3D2F60;
$base-800: #2A223F;
$base-900: #1B1627;
$base-hover: #291559;
$base-subtle: #BCADE1;

{
    "color": {
        "base": {
            "value": "#331B70",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F2FC",
                "type": "color"
            },
            "100": {
                "value": "#E5DDF8",
                "type": "color"
            },
            "200": {
                "value": "#CBBDEF",
                "type": "color"
            },
            "300": {
                "value": "#A790DF",
                "type": "color"
            },
            "400": {
                "value": "#8367CB",
                "type": "color"
            },
            "500": {
                "value": "#6345B0",
                "type": "color"
            },
            "600": {
                "value": "#503B87",
                "type": "color"
            },
            "700": {
                "value": "#3D2F60",
                "type": "color"
            },
            "800": {
                "value": "#2A223F",
                "type": "color"
            },
            "900": {
                "value": "#1B1627",
                "type": "color"
            }
        }
    }
}