What color is #505FCD?

#505FCD is a medium blue-violet. In RGB it is rgb(80, 95, 205), and in HSL hsl(233, 56%, 56%).

Is #505FCD accessible as text?

On white, #505FCD has a contrast ratio of 5.44:1 (passes WCAG AA for body text); on black it is 3.86:1 (fails). For text placed on #505FCD, use white for the best readability.

What is the closest Tailwind color to #505FCD?

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

What colors go well with #505FCD?

#505FCD pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #CEBF50. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #505FCD below.

Is #505FCD good for buttons?

#505FCD works well for buttons and highlights, but use white text on #505FCD — black text only reaches 3.86:1, below the 4.5:1 needed for normal-size labels.

Is #505FCD the same as CSS slateblue?

No — #505FCD is not the CSS named color slateblue, but slateblue (#6A5ACD) is the closest CSS named color.

#505FCD Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #505FCD

Not just a swatch — here's how #505FCD works with other colors. Named schemes with #505FCD in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #505FCD Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

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

Tech Product Signal · 5 colors

Signal #505FCD Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #7387EC

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.

Vintage Leather Lead · 5 colors

Lead #505FCD Secondary #7F4535 Surface #EED7C2 Accent #365247 Anchor #582239

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

Berry & Cream Lead · 5 colors

Lead #505FCD Surface #F6E5D8 Anchor #5B2143 Accent #E5C2C9 Secondary #322B2F

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 #505FCD Secondary #8A94BC Support #9D8F88 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.

Build a working theme in the generator →

Color Lab

How #505FCD 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 14/100

Cool

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

Softness 37/100

Low

Middle-weight — neither delicate nor heavy.

Depth 49/100

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 36/100

Low

A faint retro warmth without tipping into sepia.

Luxury 50/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 46/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 97/100

Very high

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

Surface fit 11/100

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 #505FCD

For UI

For branding

For interior

For fashion

People also use #505FCD with

Iceberg Slate Blue Dark Khaki 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 5.4:1. Use

Subtle surface Use #E0E2F2 for cards and hover fills. Tint 80

Avoid beside #6B50CE — 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 #505FCD 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: #505FCD;
  --color-base-rgb: 80 95 205;
  --color-base-oklch: oklch(53.4% 0.169 273.4);
  --color-50: #F3F4FC;
  --color-100: #DFE1F7;
  --color-200: #BFC5ED;
  --color-300: #939CDC;
  --color-400: #6B75C7;
  --color-500: #4955AC;
  --color-600: #3E4684;
  --color-700: #31365E;
  --color-800: #23263E;
  --color-900: #171926;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  slate-blue: {
    50: '#F3F4FC',
    100: '#DFE1F7',
    200: '#BFC5ED',
    300: '#939CDC',
    400: '#6B75C7',
    500: '#4955AC',
    600: '#3E4684',
    700: '#31365E',
    800: '#23263E',
    900: '#171926',
  },
}

$base: #505FCD;
$base-ink: #FFFFFF;
$base-50: #F3F4FC;
$base-100: #DFE1F7;
$base-200: #BFC5ED;
$base-300: #939CDC;
$base-400: #6B75C7;
$base-500: #4955AC;
$base-600: #3E4684;
$base-700: #31365E;
$base-800: #23263E;
$base-900: #171926;
$base-hover: #3241B2;
$base-subtle: #CFD2EC;

{
    "color": {
        "base": {
            "value": "#505FCD",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F4FC",
                "type": "color"
            },
            "100": {
                "value": "#DFE1F7",
                "type": "color"
            },
            "200": {
                "value": "#BFC5ED",
                "type": "color"
            },
            "300": {
                "value": "#939CDC",
                "type": "color"
            },
            "400": {
                "value": "#6B75C7",
                "type": "color"
            },
            "500": {
                "value": "#4955AC",
                "type": "color"
            },
            "600": {
                "value": "#3E4684",
                "type": "color"
            },
            "700": {
                "value": "#31365E",
                "type": "color"
            },
            "800": {
                "value": "#23263E",
                "type": "color"
            },
            "900": {
                "value": "#171926",
                "type": "color"
            }
        }
    }
}

Palettes built on #505FCD

Color Lab

Pairs with #505FCD

UI roles & guardrails

In real applications

Scales

Every model

Export