What color is #3754BC?

#3754BC is a medium blue. In RGB it is rgb(55, 84, 188), and in HSL hsl(227, 55%, 48%).

Is #3754BC accessible as text?

On white, #3754BC has a contrast ratio of 6.65:1 (passes WCAG AA for body text); on black it is 3.16:1 (fails). For text placed on #3754BC, use white for the best readability.

What is the closest Tailwind color to #3754BC?

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

What colors go well with #3754BC?

#3754BC pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #BEA137. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #3754BC below.

Is #3754BC good for buttons?

#3754BC works well for buttons and highlights, but use white text on #3754BC — black text only reaches 3.16:1, below the 4.5:1 needed for normal-size labels.

Is #3754BC the same as CSS royalblue?

No — #3754BC is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#3754BC Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3754BC

Not just a swatch — here's how #3754BC works with other colors. Named schemes with #3754BC in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #3754BC 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.

Tech Product Signal · 5 colors

Signal #3754BC Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #5B7BDB

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 #3754BC Secondary #7F4535 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 #3754BC Surface #F6E5D8 Anchor #5B2143 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 #3754BC Secondary #7887AC 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 #3754BC 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 11/100

Cool

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

Softness 34/100

Low

Middle-weight — neither delicate nor heavy.

Depth 54/100

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 33/100

Low

A faint retro warmth without tipping into sepia.

Luxury 55/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 45/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 94/100

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 71/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #3754BC

For UI

For branding

For interior

For fashion

People also use #3754BC with

Picton Blue Grape Brass Gainsboro Gunmetal Gray

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 6.7:1. Use

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

Avoid beside #4737BE — 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 #3754BC 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: #3754BC;
  --color-base-rgb: 55 84 188;
  --color-base-oklch: oklch(48.5% 0.167 267.9);
  --color-50: #F3F5FC;
  --color-100: #DFE4F6;
  --color-200: #C0CAED;
  --color-300: #94A3DB;
  --color-400: #6B7FC7;
  --color-500: #4A5FAB;
  --color-600: #3F4E83;
  --color-700: #313B5E;
  --color-800: #23293E;
  --color-900: #171A26;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  cerulean: {
    50: '#F3F5FC',
    100: '#DFE4F6',
    200: '#C0CAED',
    300: '#94A3DB',
    400: '#6B7FC7',
    500: '#4A5FAB',
    600: '#3F4E83',
    700: '#313B5E',
    800: '#23293E',
    900: '#171A26',
  },
}

$base: #3754BC;
$base-ink: #FFFFFF;
$base-50: #F3F5FC;
$base-100: #DFE4F6;
$base-200: #C0CAED;
$base-300: #94A3DB;
$base-400: #6B7FC7;
$base-500: #4A5FAB;
$base-600: #3F4E83;
$base-700: #313B5E;
$base-800: #23293E;
$base-900: #171A26;
$base-hover: #2C4398;
$base-subtle: #C7CEE8;

{
    "color": {
        "base": {
            "value": "#3754BC",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F5FC",
                "type": "color"
            },
            "100": {
                "value": "#DFE4F6",
                "type": "color"
            },
            "200": {
                "value": "#C0CAED",
                "type": "color"
            },
            "300": {
                "value": "#94A3DB",
                "type": "color"
            },
            "400": {
                "value": "#6B7FC7",
                "type": "color"
            },
            "500": {
                "value": "#4A5FAB",
                "type": "color"
            },
            "600": {
                "value": "#3F4E83",
                "type": "color"
            },
            "700": {
                "value": "#313B5E",
                "type": "color"
            },
            "800": {
                "value": "#23293E",
                "type": "color"
            },
            "900": {
                "value": "#171A26",
                "type": "color"
            }
        }
    }
}

Palettes built on #3754BC

Color Lab

Pairs with #3754BC

UI roles & guardrails

In real applications

Scales

Every model

Export