What color is #331E64?

#331E64 is a dark indigo. In RGB it is rgb(51, 30, 100), and in HSL hsl(258, 54%, 25%).

Is #331E64 accessible as text?

On white, #331E64 has a contrast ratio of 13.90:1 (passes WCAG AA for body text); on black it is 1.51:1 (fails). For text placed on #331E64, use white for the best readability.

What is the closest Tailwind color to #331E64?

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

What colors go well with #331E64?

#331E64 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #4E621D. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #331E64 below.

Is #331E64 good for buttons?

#331E64 works well for buttons and highlights, but use white text on #331E64 — black text only reaches 1.51:1, below the 4.5:1 needed for normal-size labels.

Is #331E64 the same as CSS midnightblue?

No — #331E64 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.

#331E64 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #331E64

Not just a swatch — here's how #331E64 works with other colors. Named schemes with #331E64 in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #331E64 Anchor #141210 Accent #DA9856 Secondary #292732 Surface #F3ECE3

Russian Violet 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 #331E64 Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DA Accent #1E042D

Russian Violet 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 Russian Violet.

Coastal Morning Lead · 5 colors

Lead #331E64 Accent #A5C4C3 Surface #E9D6BF Secondary #9AA0A1 Anchor #22334A

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

Berry & Cream Lead · 5 colors

Lead #331E64 Surface #F5E5D7 Anchor #5C2141 Accent #E5C2C8 Secondary #332B2F

Russian Violet 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 #331E64 Secondary #54516A Support #9D9088 Ink #18140F

Russian Violet 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 Russian Violet carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #331E64 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 34/100

Cool

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

Softness 26/100

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 38/100

Low

A faint retro warmth without tipping into sepia.

Luxury 74/100

High

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

Brand distinctiveness 45/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 41/100

Moderate

Workable accent with care around contrast.

Surface fit 30/100

Low

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

Print safety 84/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #331E64

For UI

For branding

For interior

For fashion

People also use #331E64 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 13.9:1. Use

Subtle surface Use #D3CAE8 for cards and hover fills. Tint 80

Avoid beside #491D62 — 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 #331E64 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: #331E64;
  --color-base-rgb: 51 30 100;
  --color-base-oklch: oklch(30.7% 0.117 291.8);
  --color-50: #F6F3FC;
  --color-100: #E6DFF6;
  --color-200: #CDC0EC;
  --color-300: #AA95DA;
  --color-400: #876CC6;
  --color-500: #674BAA;
  --color-600: #533F83;
  --color-700: #3F325D;
  --color-800: #2B233D;
  --color-900: #1C1726;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  russian-violet: {
    50: '#F6F3FC',
    100: '#E6DFF6',
    200: '#CDC0EC',
    300: '#AA95DA',
    400: '#876CC6',
    500: '#674BAA',
    600: '#533F83',
    700: '#3F325D',
    800: '#2B233D',
    900: '#1C1726',
  },
}

$base: #331E64;
$base-ink: #FFFFFF;
$base-50: #F6F3FC;
$base-100: #E6DFF6;
$base-200: #CDC0EC;
$base-300: #AA95DA;
$base-400: #876CC6;
$base-500: #674BAA;
$base-600: #533F83;
$base-700: #3F325D;
$base-800: #2B233D;
$base-900: #1C1726;
$base-hover: #28174F;
$base-subtle: #BCAEDD;

{
    "color": {
        "base": {
            "value": "#331E64",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F6F3FC",
                "type": "color"
            },
            "100": {
                "value": "#E6DFF6",
                "type": "color"
            },
            "200": {
                "value": "#CDC0EC",
                "type": "color"
            },
            "300": {
                "value": "#AA95DA",
                "type": "color"
            },
            "400": {
                "value": "#876CC6",
                "type": "color"
            },
            "500": {
                "value": "#674BAA",
                "type": "color"
            },
            "600": {
                "value": "#533F83",
                "type": "color"
            },
            "700": {
                "value": "#3F325D",
                "type": "color"
            },
            "800": {
                "value": "#2B233D",
                "type": "color"
            },
            "900": {
                "value": "#1C1726",
                "type": "color"
            }
        }
    }
}