What color is #331E87?

#331E87 is a dark indigo. In RGB it is rgb(51, 30, 135), and in HSL hsl(252, 64%, 32%).

Is #331E87 accessible as text?

On white, #331E87 has a contrast ratio of 12.53:1 (passes WCAG AA for body text); on black it is 1.68:1 (fails). For text placed on #331E87, use white for the best readability.

What is the closest Tailwind color to #331E87?

The nearest Tailwind CSS token is indigo-900 (#312C85).

What colors go well with #331E87?

#331E87 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #71861D. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #331E87 below.

Is #331E87 good for buttons?

#331E87 works well for buttons and highlights, but use white text on #331E87 — black text only reaches 1.68:1, below the 4.5:1 needed for normal-size labels.

Is #331E87 the same as CSS indigo?

No — #331E87 is not the CSS named color indigo, but indigo (#4B0082) 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.

#331E87 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #331E87

Not just a swatch — here's how #331E87 works with other colors. Named schemes with #331E87 in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #331E87 Anchor #141210 Accent #DB9758 Secondary #272833 Surface #F3ECE3

Indigo 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 #331E87 Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DA Accent #250246

Indigo 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 Indigo.

Coastal Morning Lead · 5 colors

Lead #331E87 Accent #A5C4C3 Surface #EAD5BF Secondary #9AA0A1 Anchor #22334A

Indigo 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 #331E87 Secondary #7F4534 Surface #EDD7C2 Accent #365247 Anchor #582238

Indigo 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 #331E87 Secondary #595A7D Support #9D9088 Ink #18140F

Indigo 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 Indigo carrying the quiet middle.

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Color Lab

How #331E87 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 21/100

Cool

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

Softness 25/100

Low

Firm and assertive — carries weight and contrast.

Depth 69/100

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 28/100

Low

A faint retro warmth without tipping into sepia.

Luxury 67/100

High

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

Brand distinctiveness 63/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 53/100

Moderate

Workable accent with care around contrast.

Surface fit 18/100

Very low

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

Print safety 76/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #331E87

For UI

For branding

For interior

For fashion

People also use #331E87 with

Sapphire Blue Eminence Olive Drab 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 12.5:1. Use

Subtle surface Use #D3CCEC for cards and hover fills. Tint 80

Avoid beside #551D86 — 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 #331E87 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: #331E87;
  --color-base-rgb: 51 30 135;
  --color-base-oklch: oklch(34.1% 0.162 282.8);
  --color-50: #F4F2FD;
  --color-100: #E2DDF8;
  --color-200: #C7BCF0;
  --color-300: #9F8EE1;
  --color-400: #7964CE;
  --color-500: #5942B3;
  --color-600: #493989;
  --color-700: #382E61;
  --color-800: #272140;
  --color-900: #191627;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  indigo: {
    50: '#F4F2FD',
    100: '#E2DDF8',
    200: '#C7BCF0',
    300: '#9F8EE1',
    400: '#7964CE',
    500: '#5942B3',
    600: '#493989',
    700: '#382E61',
    800: '#272140',
    900: '#191627',
  },
}

$base: #331E87;
$base-ink: #FFFFFF;
$base-50: #F4F2FD;
$base-100: #E2DDF8;
$base-200: #C7BCF0;
$base-300: #9F8EE1;
$base-400: #7964CE;
$base-500: #5942B3;
$base-600: #493989;
$base-700: #382E61;
$base-800: #272140;
$base-900: #191627;
$base-hover: #28186B;
$base-subtle: #BCB2E4;

{
    "color": {
        "base": {
            "value": "#331E87",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F2FD",
                "type": "color"
            },
            "100": {
                "value": "#E2DDF8",
                "type": "color"
            },
            "200": {
                "value": "#C7BCF0",
                "type": "color"
            },
            "300": {
                "value": "#9F8EE1",
                "type": "color"
            },
            "400": {
                "value": "#7964CE",
                "type": "color"
            },
            "500": {
                "value": "#5942B3",
                "type": "color"
            },
            "600": {
                "value": "#493989",
                "type": "color"
            },
            "700": {
                "value": "#382E61",
                "type": "color"
            },
            "800": {
                "value": "#272140",
                "type": "color"
            },
            "900": {
                "value": "#191627",
                "type": "color"
            }
        }
    }
}

Palettes built on #331E87

Color Lab

Pairs with #331E87

UI roles & guardrails

In real applications

Scales

Every model

Export