What color is #3F4ADE?

#3F4ADE is a medium, vivid blue-violet. In RGB it is rgb(63, 74, 222), and in HSL hsl(236, 71%, 56%).

Is #3F4ADE accessible as text?

On white, #3F4ADE has a contrast ratio of 6.47:1 (passes WCAG AA for body text); on black it is 3.25:1 (fails). For text placed on #3F4ADE, use white for the best readability.

What is the closest Tailwind color to #3F4ADE?

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

What colors go well with #3F4ADE?

#3F4ADE pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #DED43F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #3F4ADE below.

Is #3F4ADE good for buttons?

#3F4ADE works well for buttons and highlights, but use white text on #3F4ADE — black text only reaches 3.25:1, below the 4.5:1 needed for normal-size labels.

Is #3F4ADE the same as CSS royalblue?

No — #3F4ADE is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#3F4ADE Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3F4ADE

Not just a swatch — here's how #3F4ADE works with other colors. Named schemes with #3F4ADE in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #3F4ADE Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #6076FC

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 #3F4ADE 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 #3F4ADE 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 #3F4ADE Secondary #7C8ABC 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 #3F4ADE Secondary #E86A73 Accent #F6924F 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 #3F4ADE 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 13/100

Cool

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

Softness 30/100

Low

Firm and assertive — carries weight and contrast.

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 17/100

Very low

Clean and current — no dusty, aged cast.

Luxury 50/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 85/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 76/100

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 63/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #3F4ADE

For UI

For branding

For interior

For fashion

People also use #3F4ADE with

Picton Blue Blue Violet Citrine 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 6.5:1. Use

Subtle surface Use #DDDFF4 for cards and hover fills. Tint 80

Avoid beside #6A3FDE — 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 #3F4ADE at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #3F4ADE;
  --color-base-rgb: 63 74 222;
  --color-base-oklch: oklch(50.0% 0.221 272.1);
  --color-50: #F1F2FD;
  --color-100: #DBDDFA;
  --color-200: #B9BDF3;
  --color-300: #8A90E5;
  --color-400: #5E66D4;
  --color-500: #3C44B9;
  --color-600: #353B8D;
  --color-700: #2B2F64;
  --color-800: #1F2242;
  --color-900: #151628;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  cerulean: {
    50: '#F1F2FD',
    100: '#DBDDFA',
    200: '#B9BDF3',
    300: '#8A90E5',
    400: '#5E66D4',
    500: '#3C44B9',
    600: '#353B8D',
    700: '#2B2F64',
    800: '#1F2242',
    900: '#151628',
  },
}

$base: #3F4ADE;
$base-ink: #FFFFFF;
$base-50: #F1F2FD;
$base-100: #DBDDFA;
$base-200: #B9BDF3;
$base-300: #8A90E5;
$base-400: #5E66D4;
$base-500: #3C44B9;
$base-600: #353B8D;
$base-700: #2B2F64;
$base-800: #1F2242;
$base-900: #151628;
$base-hover: #212CC3;
$base-subtle: #CBCEF0;

{
    "color": {
        "base": {
            "value": "#3F4ADE",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F2FD",
                "type": "color"
            },
            "100": {
                "value": "#DBDDFA",
                "type": "color"
            },
            "200": {
                "value": "#B9BDF3",
                "type": "color"
            },
            "300": {
                "value": "#8A90E5",
                "type": "color"
            },
            "400": {
                "value": "#5E66D4",
                "type": "color"
            },
            "500": {
                "value": "#3C44B9",
                "type": "color"
            },
            "600": {
                "value": "#353B8D",
                "type": "color"
            },
            "700": {
                "value": "#2B2F64",
                "type": "color"
            },
            "800": {
                "value": "#1F2242",
                "type": "color"
            },
            "900": {
                "value": "#151628",
                "type": "color"
            }
        }
    }
}

Palettes built on #3F4ADE

Color Lab

Pairs with #3F4ADE

UI roles & guardrails

In real applications

Scales

Every model

Export