What color is #583BC9?

#583BC9 is a medium indigo. In RGB it is rgb(88, 59, 201), and in HSL hsl(252, 57%, 51%).

Is #583BC9 accessible as text?

On white, #583BC9 has a contrast ratio of 7.28:1 (passes WCAG AA for body text); on black it is 2.88:1 (fails). For text placed on #583BC9, use white for the best readability.

What is the closest Tailwind color to #583BC9?

The nearest Tailwind CSS token is indigo-700 (#432DD7).

What colors go well with #583BC9?

#583BC9 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #ADC93B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #583BC9 below.

Is #583BC9 good for buttons?

#583BC9 works well for buttons and highlights, but use white text on #583BC9 — black text only reaches 2.88:1, below the 4.5:1 needed for normal-size labels.

Is #583BC9 the same as CSS slateblue?

No — #583BC9 is not the CSS named color slateblue, but slateblue (#6A5ACD) is the closest CSS named color.

#583BC9 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #583BC9

Not just a swatch — here's how #583BC9 works with other colors. Named schemes with #583BC9 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #583BC9 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #7768E7

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

Berry & Cream Lead · 5 colors

Lead #583BC9 Surface #F5E5D7 Anchor #5B2142 Accent #E5C2C8 Secondary #332B2F

Cerulean 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 #583BC9 Secondary #807FAF Support #9D9088 Ink #18140F

Cerulean 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 Cerulean carrying the quiet middle.

Coastal Morning Lead · 5 colors

Lead #583BC9 Accent #A5C4C3 Surface #EAD5BF Secondary #9AA0A1 Anchor #22334A

Cerulean 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 #583BC9 Secondary #E86A6F Accent #F5934C Anchor #583B57 Surface #F7E7D7

Cerulean 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 #583BC9 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 30/100

Low

Firm and assertive — carries weight and contrast.

Depth 56/100

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 22/100

Low

Clean and current — no dusty, aged cast.

Luxury 53/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 80/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 80/100

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 70/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #583BC9

For UI

For branding

For interior

For fashion

People also use #583BC9 with

Glaucous Dark Orchid Yellow Green Gainsboro Prussian Blue

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 7.3:1. Use

Subtle surface Use #E0DCF0 for cards and hover fills. Tint 80

Avoid beside #873BC9 — 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 #583BC9 at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #583BC9;
  --color-base-rgb: 88 59 201;
  --color-base-oklch: oklch(47.7% 0.207 284.8);
  --color-50: #F4F3FC;
  --color-100: #E3DEF7;
  --color-200: #C8BFED;
  --color-300: #A293DC;
  --color-400: #7D6AC8;
  --color-500: #5C48AD;
  --color-600: #4C3D84;
  --color-700: #3A305E;
  --color-800: #28233E;
  --color-900: #1A1726;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  cerulean: {
    50: '#F4F3FC',
    100: '#E3DEF7',
    200: '#C8BFED',
    300: '#A293DC',
    400: '#7D6AC8',
    500: '#5C48AD',
    600: '#4C3D84',
    700: '#3A305E',
    800: '#28233E',
    900: '#1A1726',
  },
}

$base: #583BC9;
$base-ink: #FFFFFF;
$base-50: #F4F3FC;
$base-100: #E3DEF7;
$base-200: #C8BFED;
$base-300: #A293DC;
$base-400: #7D6AC8;
$base-500: #5C48AD;
$base-600: #4C3D84;
$base-700: #3A305E;
$base-800: #28233E;
$base-900: #1A1726;
$base-hover: #442DA3;
$base-subtle: #D0C9EA;

{
    "color": {
        "base": {
            "value": "#583BC9",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F3FC",
                "type": "color"
            },
            "100": {
                "value": "#E3DEF7",
                "type": "color"
            },
            "200": {
                "value": "#C8BFED",
                "type": "color"
            },
            "300": {
                "value": "#A293DC",
                "type": "color"
            },
            "400": {
                "value": "#7D6AC8",
                "type": "color"
            },
            "500": {
                "value": "#5C48AD",
                "type": "color"
            },
            "600": {
                "value": "#4C3D84",
                "type": "color"
            },
            "700": {
                "value": "#3A305E",
                "type": "color"
            },
            "800": {
                "value": "#28233E",
                "type": "color"
            },
            "900": {
                "value": "#1A1726",
                "type": "color"
            }
        }
    }
}

Palettes built on #583BC9

Color Lab

Pairs with #583BC9

UI roles & guardrails

In real applications

Scales

Every model

Export