What color is #4063EE?

#4063EE is a medium, vivid blue. In RGB it is rgb(64, 99, 238), and in HSL hsl(228, 84%, 59%).

Is #4063EE accessible as text?

On white, #4063EE has a contrast ratio of 4.96:1 (passes WCAG AA for body text); on black it is 4.24:1 (fails). For text placed on #4063EE, use white for the best readability.

What is the closest Tailwind color to #4063EE?

The nearest Tailwind CSS token is blue-600 (#155DFC).

What colors go well with #4063EE?

#4063EE pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #EECB3F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #4063EE below.

Is #4063EE good for buttons?

#4063EE works well for buttons and highlights, but use white text on #4063EE — black text only reaches 4.24:1, below the 4.5:1 needed for normal-size labels.

Is #4063EE the same as CSS royalblue?

No — #4063EE is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#4063EE Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #4063EE

Not just a swatch — here's how #4063EE works with other colors. Named schemes with #4063EE in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #4063EE Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #658DFF

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 #4063EE Accent #A5C4C2 Surface #EAD5C0 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 #4063EE Surface #F6E5D8 Anchor #5B2143 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 #4063EE Secondary #8A9DCD 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 #4063EE Secondary #E86A74 Accent #F69250 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 #4063EE 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 48/100

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 21/100

Low

Clean and current — no dusty, aged cast.

Luxury 46/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 82/100

Very 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 13/100

Very low

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

Print safety 63/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #4063EE

For UI

For branding

For interior

For fashion

People also use #4063EE with

Bright Sky Blue Violet Saffron 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 5.0:1. Use

Subtle surface Use #DDE3F7 for cards and hover fills. Tint 80

Avoid beside #563FEE — 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 #4063EE 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: #4063EE;
  --color-base-rgb: 64 99 238;
  --color-base-oklch: oklch(55.8% 0.213 267.9);
  --color-50: #F0F3FE;
  --color-100: #D8E0FD;
  --color-200: #B4C2F8;
  --color-300: #8197EE;
  --color-400: #536FDF;
  --color-500: #304EC4;
  --color-600: #2D4295;
  --color-700: #253369;
  --color-800: #1C2445;
  --color-900: #13182A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  royal-blue: {
    50: '#F0F3FE',
    100: '#D8E0FD',
    200: '#B4C2F8',
    300: '#8197EE',
    400: '#536FDF',
    500: '#304EC4',
    600: '#2D4295',
    700: '#253369',
    800: '#1C2445',
    900: '#13182A',
  },
}

$base: #4063EE;
$base-ink: #FFFFFF;
$base-50: #F0F3FE;
$base-100: #D8E0FD;
$base-200: #B4C2F8;
$base-300: #8197EE;
$base-400: #536FDF;
$base-500: #304EC4;
$base-600: #2D4295;
$base-700: #253369;
$base-800: #1C2445;
$base-900: #13182A;
$base-hover: #133CDD;
$base-subtle: #CCD4F4;

{
    "color": {
        "base": {
            "value": "#4063EE",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F3FE",
                "type": "color"
            },
            "100": {
                "value": "#D8E0FD",
                "type": "color"
            },
            "200": {
                "value": "#B4C2F8",
                "type": "color"
            },
            "300": {
                "value": "#8197EE",
                "type": "color"
            },
            "400": {
                "value": "#536FDF",
                "type": "color"
            },
            "500": {
                "value": "#304EC4",
                "type": "color"
            },
            "600": {
                "value": "#2D4295",
                "type": "color"
            },
            "700": {
                "value": "#253369",
                "type": "color"
            },
            "800": {
                "value": "#1C2445",
                "type": "color"
            },
            "900": {
                "value": "#13182A",
                "type": "color"
            }
        }
    }
}