What color is #4375EA?

#4375EA is a medium, vivid blue. In RGB it is rgb(67, 117, 234), and in HSL hsl(222, 80%, 59%).

Is #4375EA accessible as text?

On white, #4375EA has a contrast ratio of 4.22:1 (fails WCAG AA for body text); on black it is 4.97:1 (passes). For text placed on #4375EA, use black for the best readability.

What is the closest Tailwind color to #4375EA?

The nearest Tailwind CSS token is blue-500 (#2B7FFF).

What colors go well with #4375EA?

#4375EA pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #EAB843. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #4375EA below.

Is #4375EA good for buttons?

#4375EA works well for buttons and highlights, but use black text on #4375EA — white text only reaches 4.22:1, below the 4.5:1 needed for normal-size labels.

Is #4375EA the same as CSS royalblue?

No — #4375EA is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#4375EA Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #4375EA

Not just a swatch — here's how #4375EA works with other colors. Named schemes with #4375EA in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #4375EA Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #6C9DFF

Royal 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 Royal Blue.

Coastal Morning Lead · 5 colors

Lead #4375EA Accent #A5C4C2 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

Royal Blue 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 #4375EA Surface #F6E5D8 Anchor #5B2144 Accent #E5C2CA Secondary #322B2F

Royal 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 #4375EA Secondary #94A8D2 Support #9D8F88 Ink #18140F

Royal 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 Royal Blue carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #4375EA Secondary #E76A75 Accent #F79251 Anchor #573B58 Surface #F7E7D7

Royal Blue 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 #4375EA 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 39/100

Low

Middle-weight — neither delicate nor heavy.

Depth 43/100

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 44/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 72/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 86/100

Very high

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

Surface fit 16/100

Very low

Too saturated or mid-toned for big areas — keep it to accents.

Print safety 66/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #4375EA

For UI

For branding

For interior

For fashion

People also use #4375EA with

Sky Blue Iris Honey Gainsboro Charcoal

UI roles & guardrails

Primary action Too mid-tone for a filled button — darken for the fill. AA Large

Body text Do not use for body copy on light surfaces. Avoid

Large display Fine for headings 24px+ on white. Pass

Background Pair with #141310 text at 4.4:1. Use

Subtle surface Use #DEE5F6 for cards and hover fills. Tint 80

Avoid beside #4843EA — 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 #4375EA 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: #4375EA;
  --color-base-rgb: 67 117 234;
  --color-base-oklch: oklch(59.1% 0.185 264.1);
  --color-50: #F1F5FE;
  --color-100: #D9E4FC;
  --color-200: #B6C9F7;
  --color-300: #84A3EB;
  --color-400: #577FDB;
  --color-500: #345EC1;
  --color-600: #2F4D93;
  --color-700: #273A68;
  --color-800: #1D2944;
  --color-900: #141A29;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  royal-blue: {
    50: '#F1F5FE',
    100: '#D9E4FC',
    200: '#B6C9F7',
    300: '#84A3EB',
    400: '#577FDB',
    500: '#345EC1',
    600: '#2F4D93',
    700: '#273A68',
    800: '#1D2944',
    900: '#141A29',
  },
}

$base: #4375EA;
$base-ink: #141310;
$base-50: #F1F5FE;
$base-100: #D9E4FC;
$base-200: #B6C9F7;
$base-300: #84A3EB;
$base-400: #577FDB;
$base-500: #345EC1;
$base-600: #2F4D93;
$base-700: #273A68;
$base-800: #1D2944;
$base-900: #141A29;
$base-hover: #1852D9;
$base-subtle: #CDD8F3;

{
    "color": {
        "base": {
            "value": "#4375EA",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F5FE",
                "type": "color"
            },
            "100": {
                "value": "#D9E4FC",
                "type": "color"
            },
            "200": {
                "value": "#B6C9F7",
                "type": "color"
            },
            "300": {
                "value": "#84A3EB",
                "type": "color"
            },
            "400": {
                "value": "#577FDB",
                "type": "color"
            },
            "500": {
                "value": "#345EC1",
                "type": "color"
            },
            "600": {
                "value": "#2F4D93",
                "type": "color"
            },
            "700": {
                "value": "#273A68",
                "type": "color"
            },
            "800": {
                "value": "#1D2944",
                "type": "color"
            },
            "900": {
                "value": "#141A29",
                "type": "color"
            }
        }
    }
}