What color is #537EF3?

#537EF3 is a light, vivid blue. In RGB it is rgb(83, 126, 243), and in HSL hsl(224, 87%, 64%).

Is #537EF3 accessible as text?

On white, #537EF3 has a contrast ratio of 3.72:1 (fails WCAG AA for body text); on black it is 5.65:1 (passes). For text placed on #537EF3, use black for the best readability.

What is the closest Tailwind color to #537EF3?

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

What colors go well with #537EF3?

#537EF3 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #F3C853. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #537EF3 below.

Is #537EF3 good for buttons?

#537EF3 works well for buttons and highlights, but use black text on #537EF3 — white text only reaches 3.72:1, below the 4.5:1 needed for normal-size labels.

Is #537EF3 the same as CSS dodgerblue?

No — #537EF3 is not the CSS named color dodgerblue, but dodgerblue (#1E90FF) is the closest CSS named color.

#537EF3 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #537EF3

Not just a swatch — here's how #537EF3 works with other colors. Named schemes with #537EF3 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #537EF3 Accent #A5C4C2 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

Signal Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Nordic Calm Accent · 5 colors

Accent #537EF3 Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A7 Anchor #2E3236

Signal Blue keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Tech Product Signal · 5 colors

Signal #537EF3 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #7BA6FF

Signal 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 Signal Blue.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #537EF3 Secondary #9FB2DB Support #9D8F88 Ink #18140F

Signal 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 Signal Blue carrying the quiet middle.

Modern Café Dominant · 5 colors

Dominant #537EF3 Anchor #3B2924 Surface #F3E1D2 Accent #779E7A Secondary #3C3734

Signal Blue anchors this café scheme as the warm mid-tone, lifted by latte cream and a muted sage accent and grounded by espresso brown and a warm charcoal.

Build a working theme in the generator →

Color Lab

How #537EF3 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 10/100

Cool

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

Softness 41/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 40/100

Low

Mid depth — usable as an accent or a muted ground.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 28/100

Low

A faint retro warmth without tipping into sepia.

Luxury 42/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 70/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 81/100

Very high

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

Surface fit 19/100

Very low

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

Print safety 67/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #537EF3

For UI

For branding

For interior

For fashion

People also use #537EF3 with

Baby Blue Medium Slate Blue Saffron Gainsboro Charcoal

UI roles & guardrails

Primary action Safe as a filled button with near-black label. AA

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 5.0:1. Use

Subtle surface Use #E1E7F8 for cards and hover fills. Tint 80

Avoid beside #5E53F3 — 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 #537EF3 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: #537EF3;
  --color-base-rgb: 83 126 243;
  --color-base-oklch: oklch(62.3% 0.182 266.1);
  --color-50: #F0F4FE;
  --color-100: #D8E2FD;
  --color-200: #B3C6FA;
  --color-300: #7F9DF0;
  --color-400: #5177E1;
  --color-500: #2E57C7;
  --color-600: #2B4897;
  --color-700: #24376B;
  --color-800: #1C2745;
  --color-900: #13192A;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  signal-blue: {
    50: '#F0F4FE',
    100: '#D8E2FD',
    200: '#B3C6FA',
    300: '#7F9DF0',
    400: '#5177E1',
    500: '#2E57C7',
    600: '#2B4897',
    700: '#24376B',
    800: '#1C2745',
    900: '#13192A',
  },
}

$base: #537EF3;
$base-ink: #141310;
$base-50: #F0F4FE;
$base-100: #D8E2FD;
$base-200: #B3C6FA;
$base-300: #7F9DF0;
$base-400: #5177E1;
$base-500: #2E57C7;
$base-600: #2B4897;
$base-700: #24376B;
$base-800: #1C2745;
$base-900: #13192A;
$base-hover: #1650EF;
$base-subtle: #D1DBF6;

{
    "color": {
        "base": {
            "value": "#537EF3",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F4FE",
                "type": "color"
            },
            "100": {
                "value": "#D8E2FD",
                "type": "color"
            },
            "200": {
                "value": "#B3C6FA",
                "type": "color"
            },
            "300": {
                "value": "#7F9DF0",
                "type": "color"
            },
            "400": {
                "value": "#5177E1",
                "type": "color"
            },
            "500": {
                "value": "#2E57C7",
                "type": "color"
            },
            "600": {
                "value": "#2B4897",
                "type": "color"
            },
            "700": {
                "value": "#24376B",
                "type": "color"
            },
            "800": {
                "value": "#1C2745",
                "type": "color"
            },
            "900": {
                "value": "#13192A",
                "type": "color"
            }
        }
    }
}