What color is #537BBB?

#537BBB is a medium blue. In RGB it is rgb(83, 123, 187), and in HSL hsl(217, 43%, 53%).

Is #537BBB accessible as text?

On white, #537BBB has a contrast ratio of 4.27:1 (fails WCAG AA for body text); on black it is 4.92:1 (passes). For text placed on #537BBB, use black for the best readability.

What is the closest Tailwind color to #537BBB?

The nearest Tailwind CSS token is sky-600 (#0084D1).

What colors go well with #537BBB?

#537BBB pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #BB9354. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #537BBB below.

Is #537BBB good for buttons?

#537BBB works well for buttons and highlights, but use black text on #537BBB — white text only reaches 4.27:1, below the 4.5:1 needed for normal-size labels.

Is #537BBB the same as CSS steelblue?

No — #537BBB is not the CSS named color steelblue, but steelblue (#4682B4) is the closest CSS named color.

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

Palettes built on #537BBB

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

Coastal Morning Lead · 5 colors

Lead #537BBB Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

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

Tech Product Signal · 5 colors

Signal #537BBB Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #7AA0DC

Steel 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 Steel Blue.

Vintage Leather Lead · 5 colors

Lead #537BBB Secondary #7F4536 Surface #E1DDC1 Accent #375246 Anchor #57223A

Steel Blue plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Berry & Cream Lead · 5 colors

Lead #537BBB Surface #F6E5D8 Anchor #5A2144 Accent #E4C2CA Secondary #322B2F

Steel Blue sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #537BBB Secondary #97A6BE Support #9D8F88 Ink #16140F

Steel 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 Steel Blue carrying the quiet middle.

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Color Lab

How #537BBB 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 22/100

Cool

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

Softness 48/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 42/100

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 53/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 50/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 29/100

Low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 92/100

Very high

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

Surface fit 27/100

Low

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

Print safety 79/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #537BBB

For UI

For branding

For interior

For fashion

People also use #537BBB with

Lagoon Blue Slate Blue Camel Gainsboro Charcoal

UI roles & guardrails

Primary action Too mid-tone for a filled button — darken for the fill. AA Large

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 4.4:1. Use

Subtle surface Use #E0E5EE for cards and hover fills. Tint 80

Avoid beside #5459BB — 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 #537BBB 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: #537BBB;
  --color-base-rgb: 83 123 187;
  --color-base-oklch: oklch(58.2% 0.109 259.5);
  --color-50: #F4F7FB;
  --color-100: #E1E8F4;
  --color-200: #C5D2E8;
  --color-300: #9CB1D3;
  --color-400: #7591BD;
  --color-500: #5572A0;
  --color-600: #465B7C;
  --color-700: #364359;
  --color-800: #262E3B;
  --color-900: #191D24;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  steel-blue: {
    50: '#F4F7FB',
    100: '#E1E8F4',
    200: '#C5D2E8',
    300: '#9CB1D3',
    400: '#7591BD',
    500: '#5572A0',
    600: '#465B7C',
    700: '#364359',
    800: '#262E3B',
    900: '#191D24',
  },
}

$base: #537BBB;
$base-ink: #141310;
$base-50: #F4F7FB;
$base-100: #E1E8F4;
$base-200: #C5D2E8;
$base-300: #9CB1D3;
$base-400: #7591BD;
$base-500: #5572A0;
$base-600: #465B7C;
$base-700: #364359;
$base-800: #262E3B;
$base-900: #191D24;
$base-hover: #3E619B;
$base-subtle: #CFD8E7;

{
    "color": {
        "base": {
            "value": "#537BBB",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F7FB",
                "type": "color"
            },
            "100": {
                "value": "#E1E8F4",
                "type": "color"
            },
            "200": {
                "value": "#C5D2E8",
                "type": "color"
            },
            "300": {
                "value": "#9CB1D3",
                "type": "color"
            },
            "400": {
                "value": "#7591BD",
                "type": "color"
            },
            "500": {
                "value": "#5572A0",
                "type": "color"
            },
            "600": {
                "value": "#465B7C",
                "type": "color"
            },
            "700": {
                "value": "#364359",
                "type": "color"
            },
            "800": {
                "value": "#262E3B",
                "type": "color"
            },
            "900": {
                "value": "#191D24",
                "type": "color"
            }
        }
    }
}

Palettes built on #537BBB

Color Lab

Pairs with #537BBB

UI roles & guardrails

In real applications

Scales

Every model

Export