What color is #6366AC?

#6366AC is a medium, muted blue-violet. In RGB it is rgb(99, 102, 172), and in HSL hsl(238, 31%, 53%).

Is #6366AC accessible as text?

On white, #6366AC has a contrast ratio of 5.22:1 (passes WCAG AA for body text); on black it is 4.03:1 (fails). For text placed on #6366AC, use white for the best readability.

What is the closest Tailwind color to #6366AC?

The nearest Tailwind CSS token is sky-700 (#0069A8).

What colors go well with #6366AC?

#6366AC pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #ACAA62. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #6366AC below.

Is #6366AC good for buttons?

#6366AC works well for buttons and highlights, but use white text on #6366AC — black text only reaches 4.03:1, below the 4.5:1 needed for normal-size labels.

Is #6366AC the same as CSS slateblue?

No — #6366AC is not the CSS named color slateblue, but slateblue (#6A5ACD) is the closest CSS named color.

#6366AC Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #6366AC

Not just a swatch — here's how #6366AC works with other colors. Named schemes with #6366AC in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #6366AC Accent #A5C4C3 Surface #EAD5BF Secondary #9AA0A1 Anchor #22334A

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

Vintage Leather Lead · 5 colors

Lead #6366AC Secondary #7F4534 Surface #EDD7C2 Accent #365247 Anchor #582238

Very Peri plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Modern Café Dominant · 5 colors

Dominant #6366AC Anchor #3B2923 Surface #F3E1D2 Accent #759F7B Secondary #3C3734

Very Peri anchors this café scheme as the warm mid-tone, lifted by latte cream and a muted sage accent and grounded by espresso brown and a warm charcoal.

Berry & Cream Lead · 5 colors

Lead #6366AC Surface #F5E5D8 Anchor #5B2142 Accent #E5C2C9 Secondary #322B2F

Very Peri 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 #6366AC Secondary #9396B0 Support #9D9088 Ink #18140F

Very Peri 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 Very Peri carrying the quiet middle.

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Color Lab

How #6366AC 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 29/100

Cool

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

Softness 45/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 46/100

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 59/100

Moderate

Faded, nostalgic quality — editorial, heritage and retro work.

Luxury 54/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 29/100

Low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 96/100

Very high

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

Surface fit 23/100

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 #6366AC

For UI

For branding

For interior

For fashion

People also use #6366AC with

Cadet Grey Royal Purple Sage 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 5.2:1. Use

Subtle surface Use #E2E2EC for cards and hover fills. Tint 80

Avoid beside #7862AC — 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 #6366AC 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: #6366AC;
  --color-base-rgb: 99 102 172;
  --color-base-oklch: oklch(53.9% 0.108 280.2);
  --color-50: #F5F5FA;
  --color-100: #E4E4F1;
  --color-200: #CACAE3;
  --color-300: #A4A5CC;
  --color-400: #7F81B3;
  --color-500: #5F6196;
  --color-600: #4E4F74;
  --color-700: #3B3C54;
  --color-800: #292938;
  --color-900: #1A1B23;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  very-peri: {
    50: '#F5F5FA',
    100: '#E4E4F1',
    200: '#CACAE3',
    300: '#A4A5CC',
    400: '#7F81B3',
    500: '#5F6196',
    600: '#4E4F74',
    700: '#3B3C54',
    800: '#292938',
    900: '#1A1B23',
  },
}

$base: #6366AC;
$base-ink: #FFFFFF;
$base-50: #F5F5FA;
$base-100: #E4E4F1;
$base-200: #CACAE3;
$base-300: #A4A5CC;
$base-400: #7F81B3;
$base-500: #5F6196;
$base-600: #4E4F74;
$base-700: #3B3C54;
$base-800: #292938;
$base-900: #1A1B23;
$base-hover: #4B4D8E;
$base-subtle: #D3D3E4;

{
    "color": {
        "base": {
            "value": "#6366AC",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F5FA",
                "type": "color"
            },
            "100": {
                "value": "#E4E4F1",
                "type": "color"
            },
            "200": {
                "value": "#CACAE3",
                "type": "color"
            },
            "300": {
                "value": "#A4A5CC",
                "type": "color"
            },
            "400": {
                "value": "#7F81B3",
                "type": "color"
            },
            "500": {
                "value": "#5F6196",
                "type": "color"
            },
            "600": {
                "value": "#4E4F74",
                "type": "color"
            },
            "700": {
                "value": "#3B3C54",
                "type": "color"
            },
            "800": {
                "value": "#292938",
                "type": "color"
            },
            "900": {
                "value": "#1A1B23",
                "type": "color"
            }
        }
    }
}

Palettes built on #6366AC

Color Lab

Pairs with #6366AC

UI roles & guardrails

In real applications

Scales

Every model

Export