What color is #6B57DB?

#6B57DB is a medium indigo. In RGB it is rgb(107, 87, 219), and in HSL hsl(249, 65%, 60%).

Is #6B57DB accessible as text?

On white, #6B57DB has a contrast ratio of 5.24:1 (passes WCAG AA for body text); on black it is 4.01:1 (fails). For text placed on #6B57DB, use white for the best readability.

What is the closest Tailwind color to #6B57DB?

The nearest Tailwind CSS token is indigo-500 (#615FFF).

What colors go well with #6B57DB?

#6B57DB pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #C7DB57. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #6B57DB below.

Is #6B57DB good for buttons?

#6B57DB works well for buttons and highlights, but use white text on #6B57DB — black text only reaches 4.01:1, below the 4.5:1 needed for normal-size labels.

Is #6B57DB the same as CSS slateblue?

No — #6B57DB is not the CSS named color slateblue, but slateblue (#6A5ACD) is the closest CSS named color.

#6B57DB Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #6B57DB

Not just a swatch — here's how #6B57DB works with other colors. Named schemes with #6B57DB in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #6B57DB Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #8D81FA

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

Berry & Cream Lead · 5 colors

Lead #6B57DB Surface #F5E5D7 Anchor #5B2142 Accent #E5C2C8 Secondary #332B2F

Slate Blue 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 #6B57DB Secondary #9696C4 Support #9D9088 Ink #18140F

Slate Blue 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 Slate Blue carrying the quiet middle.

Coastal Morning Lead · 5 colors

Lead #6B57DB Accent #A5C4C3 Surface #EAD5BF Secondary #9AA0A1 Anchor #22334A

Slate Blue 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 #6B57DB Secondary #E86A6F Accent #F5934C Anchor #583B57 Surface #F7E7D7

Slate Blue 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 #6B57DB 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 21/100

Cool

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

Softness 35/100

Low

Middle-weight — neither delicate nor heavy.

Depth 48/100

Moderate

Mid depth — usable as an accent or a muted ground.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 30/100

Low

A faint retro warmth without tipping into sepia.

Luxury 47/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 75/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 89/100

Very high

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

Surface fit 12/100

Very low

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

Print safety 72/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #6B57DB

For UI

For branding

For interior

For fashion

People also use #6B57DB with

Iceberg Medium Orchid Pear Gainsboro Prussian Blue

UI roles & guardrails

Primary action Safe as a filled button with white label. AA

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 5.2:1. Use

Subtle surface Use #E4E1F4 for cards and hover fills. Tint 80

Avoid beside #9757DB — 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 #6B57DB 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: #6B57DB;
  --color-base-rgb: 107 87 219;
  --color-base-oklch: oklch(55.0% 0.193 285.0);
  --color-50: #F4F2FD;
  --color-100: #E1DDF9;
  --color-200: #C4BCF1;
  --color-300: #9A8EE2;
  --color-400: #7363CF;
  --color-500: #5241B4;
  --color-600: #453889;
  --color-700: #352D62;
  --color-800: #262140;
  --color-900: #181627;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  slate-blue: {
    50: '#F4F2FD',
    100: '#E1DDF9',
    200: '#C4BCF1',
    300: '#9A8EE2',
    400: '#7363CF',
    500: '#5241B4',
    600: '#453889',
    700: '#352D62',
    800: '#262140',
    900: '#181627',
  },
}

$base: #6B57DB;
$base-ink: #FFFFFF;
$base-50: #F4F2FD;
$base-100: #E1DDF9;
$base-200: #C4BCF1;
$base-300: #9A8EE2;
$base-400: #7363CF;
$base-500: #5241B4;
$base-600: #453889;
$base-700: #352D62;
$base-800: #262140;
$base-900: #181627;
$base-hover: #432BCA;
$base-subtle: #D6D1F0;

{
    "color": {
        "base": {
            "value": "#6B57DB",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F2FD",
                "type": "color"
            },
            "100": {
                "value": "#E1DDF9",
                "type": "color"
            },
            "200": {
                "value": "#C4BCF1",
                "type": "color"
            },
            "300": {
                "value": "#9A8EE2",
                "type": "color"
            },
            "400": {
                "value": "#7363CF",
                "type": "color"
            },
            "500": {
                "value": "#5241B4",
                "type": "color"
            },
            "600": {
                "value": "#453889",
                "type": "color"
            },
            "700": {
                "value": "#352D62",
                "type": "color"
            },
            "800": {
                "value": "#262140",
                "type": "color"
            },
            "900": {
                "value": "#181627",
                "type": "color"
            }
        }
    }
}