What color is #644CCD?

#644CCD is a medium indigo. In RGB it is rgb(100, 76, 205), and in HSL hsl(251, 56%, 55%).

Is #644CCD accessible as text?

On white, #644CCD has a contrast ratio of 6.07:1 (passes WCAG AA for body text); on black it is 3.46:1 (fails). For text placed on #644CCD, use white for the best readability.

What is the closest Tailwind color to #644CCD?

The nearest Tailwind CSS token is indigo-600 (#4F39F6).

What colors go well with #644CCD?

#644CCD pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #B5CD4C. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #644CCD below.

Is #644CCD good for buttons?

#644CCD works well for buttons and highlights, but use white text on #644CCD — black text only reaches 3.46:1, below the 4.5:1 needed for normal-size labels.

Is #644CCD the same as CSS slateblue?

No — #644CCD is not the CSS named color slateblue, but slateblue (#6A5ACD) is the closest CSS named color.

#644CCD Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #644CCD

Not just a swatch — here's how #644CCD works with other colors. Named schemes with #644CCD in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #644CCD Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #8576EC

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 #644CCD 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 #644CCD Secondary #8D8BB8 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 #644CCD Accent #A5C4C3 Surface #E9D5BF 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 #644CCD 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 #644CCD 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 22/100

Cool

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

Softness 34/100

Low

Middle-weight — neither delicate nor heavy.

Depth 52/100

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 29/100

Low

A faint retro warmth without tipping into sepia.

Luxury 51/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 73/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 90/100

Very high

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

Surface fit 9/100

Very low

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

Print safety 73/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #644CCD

For UI

For branding

For interior

For fashion

People also use #644CCD with

Cornflower Blue Medium Orchid Yellow Green 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 6.1:1. Use

Subtle surface Use #E2DFF1 for cards and hover fills. Tint 80

Avoid beside #8E4CCD — 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 #644CCD 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: #644CCD;
  --color-base-rgb: 100 76 205;
  --color-base-oklch: oklch(51.5% 0.190 286.2);
  --color-50: #F4F3FC;
  --color-100: #E3DFF7;
  --color-200: #C8BFED;
  --color-300: #A193DC;
  --color-400: #7C6BC7;
  --color-500: #5B49AC;
  --color-600: #4B3E84;
  --color-700: #39315E;
  --color-800: #28233E;
  --color-900: #1A1726;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  slate-blue: {
    50: '#F4F3FC',
    100: '#E3DFF7',
    200: '#C8BFED',
    300: '#A193DC',
    400: '#7C6BC7',
    500: '#5B49AC',
    600: '#4B3E84',
    700: '#39315E',
    800: '#28233E',
    900: '#1A1726',
  },
}

$base: #644CCD;
$base-ink: #FFFFFF;
$base-50: #F4F3FC;
$base-100: #E3DFF7;
$base-200: #C8BFED;
$base-300: #A193DC;
$base-400: #7C6BC7;
$base-500: #5B49AC;
$base-600: #4B3E84;
$base-700: #39315E;
$base-800: #28233E;
$base-900: #1A1726;
$base-hover: #4831AF;
$base-subtle: #D3CEEB;

{
    "color": {
        "base": {
            "value": "#644CCD",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F3FC",
                "type": "color"
            },
            "100": {
                "value": "#E3DFF7",
                "type": "color"
            },
            "200": {
                "value": "#C8BFED",
                "type": "color"
            },
            "300": {
                "value": "#A193DC",
                "type": "color"
            },
            "400": {
                "value": "#7C6BC7",
                "type": "color"
            },
            "500": {
                "value": "#5B49AC",
                "type": "color"
            },
            "600": {
                "value": "#4B3E84",
                "type": "color"
            },
            "700": {
                "value": "#39315E",
                "type": "color"
            },
            "800": {
                "value": "#28233E",
                "type": "color"
            },
            "900": {
                "value": "#1A1726",
                "type": "color"
            }
        }
    }
}