What color is #331C8F?

#331C8F is a dark indigo. In RGB it is rgb(51, 28, 143), and in HSL hsl(252, 67%, 34%).

Is #331C8F accessible as text?

On white, #331C8F has a contrast ratio of 12.33:1 (passes WCAG AA for body text); on black it is 1.70:1 (fails). For text placed on #331C8F, use white for the best readability.

What is the closest Tailwind color to #331C8F?

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

What colors go well with #331C8F?

#331C8F pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #7A911D. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #331C8F below.

Is #331C8F good for buttons?

#331C8F works well for buttons and highlights, but use white text on #331C8F — black text only reaches 1.70:1, below the 4.5:1 needed for normal-size labels.

Is #331C8F the same as CSS indigo?

No — #331C8F 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.

#331C8F Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #331C8F

Not just a swatch — here's how #331C8F works with other colors. Named schemes with #331C8F in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #331C8F 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 #331C8F Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DA Accent #27004B

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 #331C8F 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 #331C8F 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 #331C8F Secondary #5A5C82 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.

Build a working theme in the generator →

Color Lab

How #331C8F 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 19/100

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 25/100

Low

A faint retro warmth without tipping into sepia.

Luxury 66/100

High

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

Brand distinctiveness 67/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 54/100

Moderate

Workable accent with care around contrast.

Surface fit 17/100

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 #331C8F

For UI

For branding

For interior

For fashion

People also use #331C8F with

Sapphire Blue Purple 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 12.3:1. Use

Subtle surface Use #D4CDEE for cards and hover fills. Tint 80

Avoid beside #5B1D91 — 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 #331C8F 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: #331C8F;
  --color-base-rgb: 51 28 143;
  --color-base-oklch: oklch(34.7% 0.174 281.5);
  --color-50: #F4F2FD;
  --color-100: #E2DCF9;
  --color-200: #C6BBF1;
  --color-300: #9E8CE3;
  --color-400: #7862D0;
  --color-500: #573FB5;
  --color-600: #48378B;
  --color-700: #372C62;
  --color-800: #272041;
  --color-900: #191628;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  indigo: {
    50: '#F4F2FD',
    100: '#E2DCF9',
    200: '#C6BBF1',
    300: '#9E8CE3',
    400: '#7862D0',
    500: '#573FB5',
    600: '#48378B',
    700: '#372C62',
    800: '#272041',
    900: '#191628',
  },
}

$base: #331C8F;
$base-ink: #FFFFFF;
$base-50: #F4F2FD;
$base-100: #E2DCF9;
$base-200: #C6BBF1;
$base-300: #9E8CE3;
$base-400: #7862D0;
$base-500: #573FB5;
$base-600: #48378B;
$base-700: #372C62;
$base-800: #272041;
$base-900: #191628;
$base-hover: #291774;
$base-subtle: #BDB3E6;

{
    "color": {
        "base": {
            "value": "#331C8F",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F2FD",
                "type": "color"
            },
            "100": {
                "value": "#E2DCF9",
                "type": "color"
            },
            "200": {
                "value": "#C6BBF1",
                "type": "color"
            },
            "300": {
                "value": "#9E8CE3",
                "type": "color"
            },
            "400": {
                "value": "#7862D0",
                "type": "color"
            },
            "500": {
                "value": "#573FB5",
                "type": "color"
            },
            "600": {
                "value": "#48378B",
                "type": "color"
            },
            "700": {
                "value": "#372C62",
                "type": "color"
            },
            "800": {
                "value": "#272041",
                "type": "color"
            },
            "900": {
                "value": "#191628",
                "type": "color"
            }
        }
    }
}

Palettes built on #331C8F

Color Lab

Pairs with #331C8F

UI roles & guardrails

In real applications

Scales

Every model

Export