What color is #3E55CC?

#3E55CC is a medium blue. In RGB it is rgb(62, 85, 204), and in HSL hsl(230, 58%, 52%).

Is #3E55CC accessible as text?

On white, #3E55CC has a contrast ratio of 6.22:1 (passes WCAG AA for body text); on black it is 3.38:1 (fails). For text placed on #3E55CC, use white for the best readability.

What is the closest Tailwind color to #3E55CC?

The nearest Tailwind CSS token is blue-700 (#1447E6).

What colors go well with #3E55CC?

#3E55CC pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #CCB43E. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #3E55CC below.

Is #3E55CC good for buttons?

#3E55CC works well for buttons and highlights, but use white text on #3E55CC — black text only reaches 3.38:1, below the 4.5:1 needed for normal-size labels.

Is #3E55CC the same as CSS royalblue?

No — #3E55CC is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#3E55CC Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3E55CC

Not just a swatch — here's how #3E55CC works with other colors. Named schemes with #3E55CC in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #3E55CC Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #617DEB

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.

Coastal Morning Lead · 5 colors

Lead #3E55CC Accent #A5C4C2 Surface #EAD5C0 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.

Berry & Cream Lead · 5 colors

Lead #3E55CC Surface #F6E5D8 Anchor #5B2143 Accent #E5C2C9 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 #3E55CC Secondary #7E8CB6 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.

Sunset Warmth Glow · 5 colors

Glow #3E55CC Secondary #E86A73 Accent #F69250 Anchor #573B58 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 #3E55CC 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 12/100

Cool

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

Softness 34/100

Low

Middle-weight — neither delicate nor heavy.

Depth 53/100

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 52/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 72/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 91/100

Very high

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

Surface fit 8/100

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 #3E55CC

For UI

For branding

For interior

For fashion

People also use #3E55CC with

Picton Blue Blue Violet Mustard Yellow 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 6.2:1. Use

Subtle surface Use #DCE0F1 for cards and hover fills. Tint 80

Avoid beside #553ECC — 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 #3E55CC 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: #3E55CC;
  --color-base-rgb: 62 85 204;
  --color-base-oklch: oklch(50.4% 0.185 270.1);
  --color-50: #F2F4FC;
  --color-100: #DEE2F7;
  --color-200: #BFC6EE;
  --color-300: #929FDD;
  --color-400: #6979C9;
  --color-500: #4758AD;
  --color-600: #3D4985;
  --color-700: #30385F;
  --color-800: #23273E;
  --color-900: #171926;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  cerulean: {
    50: '#F2F4FC',
    100: '#DEE2F7',
    200: '#BFC6EE',
    300: '#929FDD',
    400: '#6979C9',
    500: '#4758AD',
    600: '#3D4985',
    700: '#30385F',
    800: '#23273E',
    900: '#171926',
  },
}

$base: #3E55CC;
$base-ink: #FFFFFF;
$base-50: #F2F4FC;
$base-100: #DEE2F7;
$base-200: #BFC6EE;
$base-300: #929FDD;
$base-400: #6979C9;
$base-500: #4758AD;
$base-600: #3D4985;
$base-700: #30385F;
$base-800: #23273E;
$base-900: #171926;
$base-hover: #2D41A8;
$base-subtle: #CACFEA;

{
    "color": {
        "base": {
            "value": "#3E55CC",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F4FC",
                "type": "color"
            },
            "100": {
                "value": "#DEE2F7",
                "type": "color"
            },
            "200": {
                "value": "#BFC6EE",
                "type": "color"
            },
            "300": {
                "value": "#929FDD",
                "type": "color"
            },
            "400": {
                "value": "#6979C9",
                "type": "color"
            },
            "500": {
                "value": "#4758AD",
                "type": "color"
            },
            "600": {
                "value": "#3D4985",
                "type": "color"
            },
            "700": {
                "value": "#30385F",
                "type": "color"
            },
            "800": {
                "value": "#23273E",
                "type": "color"
            },
            "900": {
                "value": "#171926",
                "type": "color"
            }
        }
    }
}