What color is #3F4FFE?

#3F4FFE is a light, vivid blue. In RGB it is rgb(63, 79, 254), and in HSL hsl(235, 99%, 62%).

Is #3F4FFE accessible as text?

On white, #3F4FFE has a contrast ratio of 5.58:1 (passes WCAG AA for body text); on black it is 3.76:1 (fails). For text placed on #3F4FFE, use white for the best readability.

What is the closest Tailwind color to #3F4FFE?

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

What colors go well with #3F4FFE?

#3F4FFE pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #FEEE3E. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #3F4FFE below.

Is #3F4FFE good for buttons?

#3F4FFE works well for buttons and highlights, but use white text on #3F4FFE — black text only reaches 3.76:1, below the 4.5:1 needed for normal-size labels.

Is #3F4FFE the same as CSS royalblue?

No — #3F4FFE is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#3F4FFE Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3F4FFE

Not just a swatch — here's how #3F4FFE works with other colors. Named schemes with #3F4FFE in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #3F4FFE Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #607FFF

Neon 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 Neon Blue.

Coastal Morning Lead · 5 colors

Lead #3F4FFE Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Neon 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 #3F4FFE Surface #F6E5D8 Anchor #5B2143 Accent #E5C2C9 Secondary #322B2F

Neon 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 #3F4FFE Secondary #8395CF Support #9D8F88 Ink #18140F

Neon 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 Neon Blue carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #3F4FFE Secondary #E86A73 Accent #F69250 Anchor #573B58 Surface #F7E7D7

Neon 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 #3F4FFE 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 28/100

Low

Firm and assertive — carries weight and contrast.

Depth 51/100

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 7/100

Very low

Clean and current — no dusty, aged cast.

Luxury 44/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 98/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 59/100

Moderate

Workable accent with care around contrast.

Surface fit 11/100

Very low

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

Print safety 57/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #3F4FFE

For UI

For branding

For interior

For fashion

People also use #3F4FFE with

Maya 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 5.6:1. Use

Subtle surface Use #DEE0F9 for cards and hover fills. Tint 80

Avoid beside #6E3EFE — 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 #3F4FFE 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: #3F4FFE;
  --color-base-rgb: 63 79 254;
  --color-base-oklch: oklch(53.8% 0.254 270.5);
  --color-50: #F0F1FE;
  --color-100: #D8DBFD;
  --color-200: #B1B7FC;
  --color-300: #7882F7;
  --color-400: #4755EB;
  --color-500: #2332D2;
  --color-600: #232E9F;
  --color-700: #1F266F;
  --color-800: #191D48;
  --color-900: #11132C;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  neon-blue: {
    50: '#F0F1FE',
    100: '#D8DBFD',
    200: '#B1B7FC',
    300: '#7882F7',
    400: '#4755EB',
    500: '#2332D2',
    600: '#232E9F',
    700: '#1F266F',
    800: '#191D48',
    900: '#11132C',
  },
}

$base: #3F4FFE;
$base-ink: #FFFFFF;
$base-50: #F0F1FE;
$base-100: #D8DBFD;
$base-200: #B1B7FC;
$base-300: #7882F7;
$base-400: #4755EB;
$base-500: #2332D2;
$base-600: #232E9F;
$base-700: #1F266F;
$base-800: #191D48;
$base-900: #11132C;
$base-hover: #0116FC;
$base-subtle: #CCD0F8;

{
    "color": {
        "base": {
            "value": "#3F4FFE",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F1FE",
                "type": "color"
            },
            "100": {
                "value": "#D8DBFD",
                "type": "color"
            },
            "200": {
                "value": "#B1B7FC",
                "type": "color"
            },
            "300": {
                "value": "#7882F7",
                "type": "color"
            },
            "400": {
                "value": "#4755EB",
                "type": "color"
            },
            "500": {
                "value": "#2332D2",
                "type": "color"
            },
            "600": {
                "value": "#232E9F",
                "type": "color"
            },
            "700": {
                "value": "#1F266F",
                "type": "color"
            },
            "800": {
                "value": "#191D48",
                "type": "color"
            },
            "900": {
                "value": "#11132C",
                "type": "color"
            }
        }
    }
}

Palettes built on #3F4FFE

Color Lab

Pairs with #3F4FFE

UI roles & guardrails

In real applications

Scales

Every model

Export