What color is #3757FE?

#3757FE is a medium, vivid blue. In RGB it is rgb(55, 87, 254), and in HSL hsl(230, 99%, 61%).

Is #3757FE accessible as text?

On white, #3757FE has a contrast ratio of 5.31:1 (passes WCAG AA for body text); on black it is 3.96:1 (fails). For text placed on #3757FE, use white for the best readability.

What is the closest Tailwind color to #3757FE?

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

What colors go well with #3757FE?

#3757FE pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #FEDD39. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #3757FE below.

Is #3757FE good for buttons?

#3757FE works well for buttons and highlights, but use white text on #3757FE — black text only reaches 3.96:1, below the 4.5:1 needed for normal-size labels.

Is #3757FE the same as CSS royalblue?

No — #3757FE is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#3757FE Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3757FE

Not just a swatch — here's how #3757FE works with other colors. Named schemes with #3757FE in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #3757FE Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #5B85FF

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 #3757FE 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 #3757FE Surface #F6E5D8 Anchor #5B2143 Accent #E5C2CA 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 #3757FE Secondary #8399D1 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 #3757FE Secondary #E86A74 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 #3757FE 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 29/100

Low

Firm and assertive — carries weight and contrast.

Depth 50/100

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 9/100

Very low

Clean and current — no dusty, aged cast.

Luxury 44/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 96/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 62/100

High

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

Surface fit 12/100

Very low

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

Print safety 56/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #3757FE

For UI

For branding

For interior

For fashion

People also use #3757FE with

Bright Sky Violet Saffron 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 5.3:1. Use

Subtle surface Use #DDE2F9 for cards and hover fills. Tint 80

Avoid beside #5A39FE — 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 #3757FE 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: #3757FE;
  --color-base-rgb: 55 87 254;
  --color-base-oklch: oklch(54.7% 0.248 268.0);
  --color-50: #F0F3FE;
  --color-100: #D8DEFD;
  --color-200: #B1BDFC;
  --color-300: #788DF7;
  --color-400: #4762EB;
  --color-500: #2340D2;
  --color-600: #23389F;
  --color-700: #1F2D6F;
  --color-800: #192148;
  --color-900: #11162C;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  neon-blue: {
    50: '#F0F3FE',
    100: '#D8DEFD',
    200: '#B1BDFC',
    300: '#788DF7',
    400: '#4762EB',
    500: '#2340D2',
    600: '#23389F',
    700: '#1F2D6F',
    800: '#192148',
    900: '#11162C',
  },
}

$base: #3757FE;
$base-ink: #FFFFFF;
$base-50: #F0F3FE;
$base-100: #D8DEFD;
$base-200: #B1BDFC;
$base-300: #788DF7;
$base-400: #4762EB;
$base-500: #2340D2;
$base-600: #23389F;
$base-700: #1F2D6F;
$base-800: #192148;
$base-900: #11162C;
$base-hover: #012AF8;
$base-subtle: #CBD2F8;

{
    "color": {
        "base": {
            "value": "#3757FE",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F3FE",
                "type": "color"
            },
            "100": {
                "value": "#D8DEFD",
                "type": "color"
            },
            "200": {
                "value": "#B1BDFC",
                "type": "color"
            },
            "300": {
                "value": "#788DF7",
                "type": "color"
            },
            "400": {
                "value": "#4762EB",
                "type": "color"
            },
            "500": {
                "value": "#2340D2",
                "type": "color"
            },
            "600": {
                "value": "#23389F",
                "type": "color"
            },
            "700": {
                "value": "#1F2D6F",
                "type": "color"
            },
            "800": {
                "value": "#192148",
                "type": "color"
            },
            "900": {
                "value": "#11162C",
                "type": "color"
            }
        }
    }
}

Palettes built on #3757FE

Color Lab

Pairs with #3757FE

UI roles & guardrails

In real applications

Scales

Every model

Export