What color is #287DAF?

#287DAF is a medium cyan-blue. In RGB it is rgb(40, 125, 175), and in HSL hsl(202, 63%, 42%).

Is #287DAF accessible as text?

On white, #287DAF has a contrast ratio of 4.52:1 (passes WCAG AA for body text); on black it is 4.64:1 (passes). For text placed on #287DAF, use black for the best readability.

What is the closest Tailwind color to #287DAF?

The nearest Tailwind CSS token is cyan-700 (#007595).

What colors go well with #287DAF?

#287DAF pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #AF5928. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #287DAF below.

Is #287DAF good for buttons?

#287DAF works for buttons; black text has the higher contrast, so prefer it for labels.

Is #287DAF the same as CSS steelblue?

No — #287DAF is not the CSS named color steelblue, but steelblue (#4682B4) is the closest CSS named color.

#287DAF Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #287DAF

Not just a swatch — here's how #287DAF works with other colors. Named schemes with #287DAF in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #287DAF 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 #287DAF Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #5BA1D0

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 #287DAF Secondary #7F4439 Surface #E2DDC0 Accent #385245 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 #287DAF Surface #EEE9D6 Anchor #592246 Accent #E4C2CC 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 #287DAF Secondary #8AA3B5 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.

Build a working theme in the generator →

Color Lab

How #287DAF 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 18/100

Cool

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

Softness 46/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 44/100

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 52/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 52/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 30/100

Low

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

UI accent fit 95/100

Very high

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

Surface fit 25/100

Low

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

Print safety 73/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #287DAF

For UI

For branding

For interior

For fashion

People also use #287DAF with

Medium Aquamarine Egyptian Blue Sienna Platinum Charcoal

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 4.5:1. Use

Subtle surface Use #D4E5EF for cards and hover fills. Tint 80

Avoid beside #2850AF — 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 #287DAF 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: #287DAF;
  --color-base-rgb: 40 125 175;
  --color-base-oklch: oklch(56.3% 0.110 239.4);
  --color-50: #F2F9FD;
  --color-100: #DDEEF8;
  --color-200: #BDDDF0;
  --color-300: #8FC2E0;
  --color-400: #65A7CD;
  --color-500: #4389B2;
  --color-600: #3A6B88;
  --color-700: #2E4E61;
  --color-800: #213440;
  --color-900: #162127;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  steel-blue: {
    50: '#F2F9FD',
    100: '#DDEEF8',
    200: '#BDDDF0',
    300: '#8FC2E0',
    400: '#65A7CD',
    500: '#4389B2',
    600: '#3A6B88',
    700: '#2E4E61',
    800: '#213440',
    900: '#162127',
  },
}

$base: #287DAF;
$base-ink: #141310;
$base-50: #F2F9FD;
$base-100: #DDEEF8;
$base-200: #BDDDF0;
$base-300: #8FC2E0;
$base-400: #65A7CD;
$base-500: #4389B2;
$base-600: #3A6B88;
$base-700: #2E4E61;
$base-800: #213440;
$base-900: #162127;
$base-hover: #20648C;
$base-subtle: #BDD8E8;

{
    "color": {
        "base": {
            "value": "#287DAF",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F9FD",
                "type": "color"
            },
            "100": {
                "value": "#DDEEF8",
                "type": "color"
            },
            "200": {
                "value": "#BDDDF0",
                "type": "color"
            },
            "300": {
                "value": "#8FC2E0",
                "type": "color"
            },
            "400": {
                "value": "#65A7CD",
                "type": "color"
            },
            "500": {
                "value": "#4389B2",
                "type": "color"
            },
            "600": {
                "value": "#3A6B88",
                "type": "color"
            },
            "700": {
                "value": "#2E4E61",
                "type": "color"
            },
            "800": {
                "value": "#213440",
                "type": "color"
            },
            "900": {
                "value": "#162127",
                "type": "color"
            }
        }
    }
}

Palettes built on #287DAF

Color Lab

Pairs with #287DAF

UI roles & guardrails

In real applications

Scales

Every model

Export