What color is #640291?

#640291 is a dark, vivid purple. In RGB it is rgb(100, 2, 145), and in HSL hsl(281, 97%, 29%).

Is #640291 accessible as text?

On white, #640291 has a contrast ratio of 10.72:1 (passes WCAG AA for body text); on black it is 1.96:1 (fails). For text placed on #640291, use white for the best readability.

What is the closest Tailwind color to #640291?

The nearest Tailwind CSS token is purple-900 (#59168B).

What colors go well with #640291?

#640291 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #309202. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #640291 below.

Is #640291 good for buttons?

#640291 works well for buttons and highlights, but use white text on #640291 — black text only reaches 1.96:1, below the 4.5:1 needed for normal-size labels.

Is #640291 the same as CSS indigo?

No — #640291 is not the CSS named color indigo, but indigo (#4B0082) is the closest CSS named color.

#640291 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #640291

Not just a swatch — here's how #640291 works with other colors. Named schemes with #640291 in its natural role, and a note on why the supporting colors balance it.

Berry & Cream Lead · 5 colors

Lead #640291 Surface #F5E6D7 Anchor #5C213F Accent #E5C2C7 Secondary #332B2F

Indigo sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Tech Product Signal · 5 colors

Signal #640291 Surface #14161A Highlight #F4F6F8 Secondary #5C6573 Accent #8440B0

Indigo is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Indigo.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #640291 Secondary #78618A Support #9C9088 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.

Coastal Morning Lead · 5 colors

Lead #640291 Accent #A5C4C4 Surface #E9D6BF Secondary #9AA0A1 Anchor #23334B

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

Sunset Warmth Glow · 5 colors

Glow #640291 Secondary #E86B69 Accent #F39546 Anchor #593A55 Surface #F6E7D7

Indigo glows at the center of this sunset palette, joined by coral and gold, deepened by a plum anchor and cooled with cream.

Build a working theme in the generator →

Color Lab

How #640291 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 41/100

Neutral

Balanced temperature — flexible, sits between warm and cool schemes.

Softness 26/100

Low

Firm and assertive — carries weight and contrast.

Depth 65/100

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 24/100

Low

Clean and current — no dusty, aged cast.

Luxury 60/100

High

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

Brand distinctiveness 76/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 63/100

High

Strong interactive accent — visible and can carry a legible label.

Surface fit 15/100

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 #640291

For UI

For branding

For interior

For fashion

People also use #640291 with

Zaffre Mardi Gras Green Gainsboro Eggplant

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 10.7:1. Use

Subtle surface Use #E4C2F4 for cards and hover fills. Tint 80

Avoid beside #92028F — 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 #640291 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: #640291;
  --color-base-rgb: 100 2 145;
  --color-base-oklch: oklch(39.0% 0.196 309.5);
  --color-50: #FAF0FE;
  --color-100: #F1D8FD;
  --color-200: #E4B1FC;
  --color-300: #CF79F6;
  --color-400: #B649E9;
  --color-500: #9A25D0;
  --color-600: #77259D;
  --color-700: #56206F;
  --color-800: #391948;
  --color-900: #23112C;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  indigo: {
    50: '#FAF0FE',
    100: '#F1D8FD',
    200: '#E4B1FC',
    300: '#CF79F6',
    400: '#B649E9',
    500: '#9A25D0',
    600: '#77259D',
    700: '#56206F',
    800: '#391948',
    900: '#23112C',
  },
}

$base: #640291;
$base-ink: #FFFFFF;
$base-50: #FAF0FE;
$base-100: #F1D8FD;
$base-200: #E4B1FC;
$base-300: #CF79F6;
$base-400: #B649E9;
$base-500: #9A25D0;
$base-600: #77259D;
$base-700: #56206F;
$base-800: #391948;
$base-900: #23112C;
$base-hover: #500275;
$base-subtle: #D7A1F1;

{
    "color": {
        "base": {
            "value": "#640291",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#FAF0FE",
                "type": "color"
            },
            "100": {
                "value": "#F1D8FD",
                "type": "color"
            },
            "200": {
                "value": "#E4B1FC",
                "type": "color"
            },
            "300": {
                "value": "#CF79F6",
                "type": "color"
            },
            "400": {
                "value": "#B649E9",
                "type": "color"
            },
            "500": {
                "value": "#9A25D0",
                "type": "color"
            },
            "600": {
                "value": "#77259D",
                "type": "color"
            },
            "700": {
                "value": "#56206F",
                "type": "color"
            },
            "800": {
                "value": "#391948",
                "type": "color"
            },
            "900": {
                "value": "#23112C",
                "type": "color"
            }
        }
    }
}

Palettes built on #640291

Color Lab

Pairs with #640291

UI roles & guardrails

In real applications

Scales

Every model

Export