What color is #6400BB?

#6400BB is a dark, vivid violet. In RGB it is rgb(100, 0, 187), and in HSL hsl(272, 100%, 37%).

Is #6400BB accessible as text?

On white, #6400BB has a contrast ratio of 9.29:1 (passes WCAG AA for body text); on black it is 2.26:1 (fails). For text placed on #6400BB, use white for the best readability.

What is the closest Tailwind color to #6400BB?

The nearest Tailwind CSS token is violet-800 (#5D0EC0).

What colors go well with #6400BB?

#6400BB pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #58BD00. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #6400BB below.

Is #6400BB good for buttons?

#6400BB works well for buttons and highlights, but use white text on #6400BB — black text only reaches 2.26:1, below the 4.5:1 needed for normal-size labels.

Is #6400BB the same as CSS rebeccapurple?

No — #6400BB is not the CSS named color rebeccapurple, but rebeccapurple (#663399) is the closest CSS named color.

#6400BB Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #6400BB

Not just a swatch — here's how #6400BB works with other colors. Named schemes with #6400BB in its natural role, and a note on why the supporting colors balance it.

Berry & Cream Lead · 5 colors

Lead #6400BB Surface #F5E6D7 Anchor #5C2140 Accent #E5C2C8 Secondary #332B2F

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

Tech Product Signal · 5 colors

Signal #6400BB Surface #14161A Highlight #F4F6F8 Secondary #5B6572 Accent #8349D9

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #6400BB Secondary #7C6DA2 Support #9C9088 Ink #18140F

Grape 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 Grape carrying the quiet middle.

Coastal Morning Lead · 5 colors

Lead #6400BB Accent #A5C4C4 Surface #E9D6BF Secondary #9AA0A1 Anchor #23334B

Grape 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 #6400BB Secondary #E86B6C Accent #F49449 Anchor #583A56 Surface #F7E7D7

Grape 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 #6400BB 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 31/100

Cool

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

Softness 25/100

Low

Firm and assertive — carries weight and contrast.

Depth 63/100

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 13/100

Very low

Clean and current — no dusty, aged cast.

Luxury 54/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 90/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 60/100

Moderate

Workable accent with care around contrast.

Surface fit 12/100

Very low

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

Print safety 70/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #6400BB

For UI

For branding

For interior

For fashion

People also use #6400BB with

Blue Byzantine Olive Drab Gainsboro Onyx

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 9.3:1. Use

Subtle surface Use #E0C8F6 for cards and hover fills. Tint 80

Avoid beside #A400BD — 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 #6400BB 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: #6400BB;
  --color-base-rgb: 100 0 187;
  --color-base-oklch: oklch(43.0% 0.233 297.4);
  --color-50: #F8F0FE;
  --color-100: #ECD8FD;
  --color-200: #D9B1FC;
  --color-300: #BC77F8;
  --color-400: #9F46EC;
  --color-500: #8022D2;
  --color-600: #65239F;
  --color-700: #4A1F70;
  --color-800: #321848;
  --color-900: #20112C;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  grape: {
    50: '#F8F0FE',
    100: '#ECD8FD',
    200: '#D9B1FC',
    300: '#BC77F8',
    400: '#9F46EC',
    500: '#8022D2',
    600: '#65239F',
    700: '#4A1F70',
    800: '#321848',
    900: '#20112C',
  },
}

$base: #6400BB;
$base-ink: #FFFFFF;
$base-50: #F8F0FE;
$base-100: #ECD8FD;
$base-200: #D9B1FC;
$base-300: #BC77F8;
$base-400: #9F46EC;
$base-500: #8022D2;
$base-600: #65239F;
$base-700: #4A1F70;
$base-800: #321848;
$base-900: #20112C;
$base-hover: #510097;
$base-subtle: #D1AAF3;

{
    "color": {
        "base": {
            "value": "#6400BB",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F8F0FE",
                "type": "color"
            },
            "100": {
                "value": "#ECD8FD",
                "type": "color"
            },
            "200": {
                "value": "#D9B1FC",
                "type": "color"
            },
            "300": {
                "value": "#BC77F8",
                "type": "color"
            },
            "400": {
                "value": "#9F46EC",
                "type": "color"
            },
            "500": {
                "value": "#8022D2",
                "type": "color"
            },
            "600": {
                "value": "#65239F",
                "type": "color"
            },
            "700": {
                "value": "#4A1F70",
                "type": "color"
            },
            "800": {
                "value": "#321848",
                "type": "color"
            },
            "900": {
                "value": "#20112C",
                "type": "color"
            }
        }
    }
}

Palettes built on #6400BB

Color Lab

Pairs with #6400BB

UI roles & guardrails

In real applications

Scales

Every model

Export