What color is #2A52BE?

Cerulean (#2A52BE) is a medium blue. In RGB it is rgb(42, 82, 190), and in HSL hsl(224, 64%, 45%).

Is #2A52BE accessible as text?

On white, #2A52BE has a contrast ratio of 6.89:1 (passes WCAG AA for body text); on black it is 3.05:1 (fails). For text placed on #2A52BE, use white for the best readability.

What is the closest Tailwind color to #2A52BE?

The nearest Tailwind CSS token is blue-800 (#193CB8).

What colors go well with #2A52BE?

#2A52BE pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #BC9529. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #2A52BE below.

Is Cerulean good for buttons?

Cerulean works well for buttons and highlights, but use white text on #2A52BE — black text only reaches 3.05:1, below the 4.5:1 needed for normal-size labels.

Is Cerulean a CSS named color?

No — Cerulean is not a standard CSS named color; use the hex value #2A52BE in CSS. The closest CSS named color is royalblue.

Cerulean (#2A52BE) Color Palette, HEX, RGB & Design Ideas

Palettes built on Cerulean

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

Coastal Morning Lead · 5 colors

Lead #2A52BE Accent #A5C4C2 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

Cerulean 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 #2A52BE Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #5079DD

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.

Vintage Leather Lead · 5 colors

Lead #2A52BE Secondary #7F4536 Surface #EED7C2 Accent #365246 Anchor #58223A

Cerulean 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 #2A52BE Surface #F6E5D8 Anchor #5B2144 Accent #E5C2CA Secondary #322B2F

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 #2A52BE Secondary #7385AB Support #9D8F88 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.

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Color Lab

How Cerulean 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 9/100

Cool

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

Softness 33/100

Low

Middle-weight — neither delicate nor heavy.

Depth 55/100

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 55/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 48/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 91/100

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 68/100

High

Prints close, with a slight loss of vibrancy.

Pairs with Cerulean

For UI

For branding

For interior

For fashion

People also use Cerulean with

Lagoon Blue Grape Dijon Gainsboro Charcoal

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 6.9:1. Use

Subtle surface Use #D6DDF0 for cards and hover fills. Tint 80

Avoid beside #3329BC — 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 Cerulean 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: #2A52BE;
  --color-base-rgb: 42 82 190;
  --color-base-oklch: oklch(47.7% 0.176 264.9);
  --color-50: #F2F5FD;
  --color-100: #DDE4F8;
  --color-200: #BCCAF0;
  --color-300: #8EA4E1;
  --color-400: #6480CE;
  --color-500: #4260B3;
  --color-600: #394E89;
  --color-700: #2E3B61;
  --color-800: #212940;
  --color-900: #161B27;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  cerulean: {
    50: '#F2F5FD',
    100: '#DDE4F8',
    200: '#BCCAF0',
    300: '#8EA4E1',
    400: '#6480CE',
    500: '#4260B3',
    600: '#394E89',
    700: '#2E3B61',
    800: '#212940',
    900: '#161B27',
  },
}

$base: #2A52BE;
$base-ink: #FFFFFF;
$base-50: #F2F5FD;
$base-100: #DDE4F8;
$base-200: #BCCAF0;
$base-300: #8EA4E1;
$base-400: #6480CE;
$base-500: #4260B3;
$base-600: #394E89;
$base-700: #2E3B61;
$base-800: #212940;
$base-900: #161B27;
$base-hover: #214097;
$base-subtle: #C0CBE9;

{
    "color": {
        "base": {
            "value": "#2A52BE",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F5FD",
                "type": "color"
            },
            "100": {
                "value": "#DDE4F8",
                "type": "color"
            },
            "200": {
                "value": "#BCCAF0",
                "type": "color"
            },
            "300": {
                "value": "#8EA4E1",
                "type": "color"
            },
            "400": {
                "value": "#6480CE",
                "type": "color"
            },
            "500": {
                "value": "#4260B3",
                "type": "color"
            },
            "600": {
                "value": "#394E89",
                "type": "color"
            },
            "700": {
                "value": "#2E3B61",
                "type": "color"
            },
            "800": {
                "value": "#212940",
                "type": "color"
            },
            "900": {
                "value": "#161B27",
                "type": "color"
            }
        }
    }
}

Palettes built on Cerulean

Color Lab

Pairs with Cerulean

UI roles & guardrails

In real applications

Scales

Every model

Export