What color is #331B83?

#331B83 is a dark indigo. In RGB it is rgb(51, 27, 131), and in HSL hsl(254, 66%, 31%).

Is #331B83 accessible as text?

On white, #331B83 has a contrast ratio of 12.92:1 (passes WCAG AA for body text); on black it is 1.63:1 (fails). For text placed on #331B83, use white for the best readability.

What is the closest Tailwind color to #331B83?

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

What colors go well with #331B83?

#331B83 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #6B831B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #331B83 below.

Is #331B83 good for buttons?

#331B83 works well for buttons and highlights, but use white text on #331B83 — black text only reaches 1.63:1, below the 4.5:1 needed for normal-size labels.

Is #331B83 the same as CSS indigo?

No — #331B83 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.

#331B83 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #331B83

Not just a swatch — here's how #331B83 works with other colors. Named schemes with #331B83 in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #331B83 Anchor #141210 Accent #DB9757 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 #331B83 Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DA Accent #240042

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 #331B83 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 #331B83 Secondary #7E4533 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 #331B83 Secondary #58577A 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 #331B83 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 22/100

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 68/100

High

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

Brand distinctiveness 62/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 50/100

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 77/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #331B83

For UI

For branding

For interior

For fashion

People also use #331B83 with

Cobalt Blue Eminence 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 12.9:1. Use

Subtle surface Use #D3CBED for cards and hover fills. Tint 80

Avoid beside #561B83 — 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 #331B83 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: #331B83;
  --color-base-rgb: 51 27 131;
  --color-base-oklch: oklch(33.3% 0.160 284.1);
  --color-50: #F4F2FD;
  --color-100: #E3DCF9;
  --color-200: #C8BBF1;
  --color-300: #A18DE2;
  --color-400: #7C62D0;
  --color-500: #5B40B5;
  --color-600: #4B388A;
  --color-700: #392D62;
  --color-800: #282140;
  --color-900: #1A1628;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  indigo: {
    50: '#F4F2FD',
    100: '#E3DCF9',
    200: '#C8BBF1',
    300: '#A18DE2',
    400: '#7C62D0',
    500: '#5B40B5',
    600: '#4B388A',
    700: '#392D62',
    800: '#282140',
    900: '#1A1628',
  },
}

$base: #331B83;
$base-ink: #FFFFFF;
$base-50: #F4F2FD;
$base-100: #E3DCF9;
$base-200: #C8BBF1;
$base-300: #A18DE2;
$base-400: #7C62D0;
$base-500: #5B40B5;
$base-600: #4B388A;
$base-700: #392D62;
$base-800: #282140;
$base-900: #1A1628;
$base-hover: #291669;
$base-subtle: #BCB0E5;

{
    "color": {
        "base": {
            "value": "#331B83",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F2FD",
                "type": "color"
            },
            "100": {
                "value": "#E3DCF9",
                "type": "color"
            },
            "200": {
                "value": "#C8BBF1",
                "type": "color"
            },
            "300": {
                "value": "#A18DE2",
                "type": "color"
            },
            "400": {
                "value": "#7C62D0",
                "type": "color"
            },
            "500": {
                "value": "#5B40B5",
                "type": "color"
            },
            "600": {
                "value": "#4B388A",
                "type": "color"
            },
            "700": {
                "value": "#392D62",
                "type": "color"
            },
            "800": {
                "value": "#282140",
                "type": "color"
            },
            "900": {
                "value": "#1A1628",
                "type": "color"
            }
        }
    }
}

Palettes built on #331B83

Color Lab

Pairs with #331B83

UI roles & guardrails

In real applications

Scales

Every model

Export