What color is #2581BB?

#2581BB is a medium cyan-blue. In RGB it is rgb(37, 129, 187), and in HSL hsl(203, 67%, 44%).

Is #2581BB accessible as text?

On white, #2581BB has a contrast ratio of 4.25:1 (fails WCAG AA for body text); on black it is 4.94:1 (passes). For text placed on #2581BB, use black for the best readability.

What is the closest Tailwind color to #2581BB?

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

What colors go well with #2581BB?

#2581BB pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #BB5F25. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #2581BB below.

Is #2581BB good for buttons?

#2581BB works well for buttons and highlights, but use black text on #2581BB — white text only reaches 4.25:1, below the 4.5:1 needed for normal-size labels.

Is #2581BB the same as CSS steelblue?

No — #2581BB is not the CSS named color steelblue, but steelblue (#4682B4) is the closest CSS named color.

#2581BB Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #2581BB

Not just a swatch — here's how #2581BB works with other colors. Named schemes with #2581BB in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #2581BB Accent #A5C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

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 #2581BB Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #5AA6DC

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 #2581BB Secondary #7F4439 Surface #E2DDC0 Accent #375245 Anchor #57233C

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 #2581BB Surface #EEE9D6 Anchor #5A2246 Accent #E4C2CB Secondary #322B30

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 #2581BB Secondary #8DA8BD Support #969386 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 #2581BB 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 15/100

Cool

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

Softness 46/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 43/100

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 48/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 49/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 33/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 95/100

Very high

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

Surface fit 23/100

Low

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

Print safety 71/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #2581BB

For UI

For branding

For interior

For fashion

People also use #2581BB with

Medium Aquamarine Egyptian Blue Ginger Platinum 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 #D5E6F0 for cards and hover fills. Tint 80

Avoid beside #2550BB — 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 #2581BB 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: #2581BB;
  --color-base-rgb: 37 129 187;
  --color-base-oklch: oklch(57.8% 0.122 241.8);
  --color-50: #F2F9FD;
  --color-100: #DCEEF9;
  --color-200: #BBDDF1;
  --color-300: #8CC2E3;
  --color-400: #62A6D0;
  --color-500: #3F88B5;
  --color-600: #376B8B;
  --color-700: #2C4E62;
  --color-800: #203441;
  --color-900: #162128;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  steel-blue: {
    50: '#F2F9FD',
    100: '#DCEEF9',
    200: '#BBDDF1',
    300: '#8CC2E3',
    400: '#62A6D0',
    500: '#3F88B5',
    600: '#376B8B',
    700: '#2C4E62',
    800: '#203441',
    900: '#162128',
  },
}

$base: #2581BB;
$base-ink: #141310;
$base-50: #F2F9FD;
$base-100: #DCEEF9;
$base-200: #BBDDF1;
$base-300: #8CC2E3;
$base-400: #62A6D0;
$base-500: #3F88B5;
$base-600: #376B8B;
$base-700: #2C4E62;
$base-800: #203441;
$base-900: #162128;
$base-hover: #1E6896;
$base-subtle: #BED9EA;

{
    "color": {
        "base": {
            "value": "#2581BB",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F9FD",
                "type": "color"
            },
            "100": {
                "value": "#DCEEF9",
                "type": "color"
            },
            "200": {
                "value": "#BBDDF1",
                "type": "color"
            },
            "300": {
                "value": "#8CC2E3",
                "type": "color"
            },
            "400": {
                "value": "#62A6D0",
                "type": "color"
            },
            "500": {
                "value": "#3F88B5",
                "type": "color"
            },
            "600": {
                "value": "#376B8B",
                "type": "color"
            },
            "700": {
                "value": "#2C4E62",
                "type": "color"
            },
            "800": {
                "value": "#203441",
                "type": "color"
            },
            "900": {
                "value": "#162128",
                "type": "color"
            }
        }
    }
}

Palettes built on #2581BB

Color Lab

Pairs with #2581BB

UI roles & guardrails

In real applications

Scales

Every model

Export