What color is #428BC3?

#428BC3 is a medium cyan-blue. In RGB it is rgb(66, 139, 195), and in HSL hsl(206, 52%, 51%).

Is #428BC3 accessible as text?

On white, #428BC3 has a contrast ratio of 3.68:1 (fails WCAG AA for body text); on black it is 5.71:1 (passes). For text placed on #428BC3, use black for the best readability.

What is the closest Tailwind color to #428BC3?

The nearest Tailwind CSS token is cyan-600 (#0092B8).

What colors go well with #428BC3?

#428BC3 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #C37941. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #428BC3 below.

Is #428BC3 good for buttons?

#428BC3 works well for buttons and highlights, but use black text on #428BC3 — white text only reaches 3.68:1, below the 4.5:1 needed for normal-size labels.

Is #428BC3 the same as CSS steelblue?

No — #428BC3 is not the CSS named color steelblue, but steelblue (#4682B4) is the closest CSS named color.

#428BC3 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #428BC3

Not just a swatch — here's how #428BC3 works with other colors. Named schemes with #428BC3 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #428BC3 Accent #A5C4C0 Surface #DEDBBF Secondary #9AA0A0 Anchor #20344A

Ocean 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 #428BC3 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #70B0E4

Ocean 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 Ocean Blue.

Vintage Leather Lead · 5 colors

Lead #428BC3 Secondary #7F4438 Surface #E1DDC0 Accent #375245 Anchor #57233C

Ocean 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 #428BC3 Surface #EEE9D6 Anchor #5A2246 Accent #E4C2CB Secondary #322B30

Ocean 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 #428BC3 Secondary #9BB3C7 Support #969386 Ink #16140F

Ocean 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 Ocean Blue carrying the quiet middle.

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Color Lab

How #428BC3 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 50/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 39/100

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 48/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 47/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 30/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 85/100

Very high

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

Surface fit 29/100

Low

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

Print safety 74/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #428BC3

For UI

For branding

For interior

For fashion

People also use #428BC3 with

Medium Turquoise Cerulean Ochre 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 5.1:1. Use

Subtle surface Use #DDE7EF for cards and hover fills. Tint 80

Avoid beside #415FC3 — 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 #428BC3 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: #428BC3;
  --color-base-rgb: 66 139 195;
  --color-base-oklch: oklch(61.5% 0.112 244.3);
  --color-50: #F3F8FC;
  --color-100: #DFECF6;
  --color-200: #C1D9EB;
  --color-300: #96BCD9;
  --color-400: #6E9FC4;
  --color-500: #4D81A8;
  --color-600: #416581;
  --color-700: #324A5C;
  --color-800: #24323D;
  --color-900: #182026;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  ocean-blue: {
    50: '#F3F8FC',
    100: '#DFECF6',
    200: '#C1D9EB',
    300: '#96BCD9',
    400: '#6E9FC4',
    500: '#4D81A8',
    600: '#416581',
    700: '#324A5C',
    800: '#24323D',
    900: '#182026',
  },
}

$base: #428BC3;
$base-ink: #141310;
$base-50: #F3F8FC;
$base-100: #DFECF6;
$base-200: #C1D9EB;
$base-300: #96BCD9;
$base-400: #6E9FC4;
$base-500: #4D81A8;
$base-600: #416581;
$base-700: #324A5C;
$base-800: #24323D;
$base-900: #182026;
$base-hover: #326F9E;
$base-subtle: #CBDBE8;

{
    "color": {
        "base": {
            "value": "#428BC3",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F8FC",
                "type": "color"
            },
            "100": {
                "value": "#DFECF6",
                "type": "color"
            },
            "200": {
                "value": "#C1D9EB",
                "type": "color"
            },
            "300": {
                "value": "#96BCD9",
                "type": "color"
            },
            "400": {
                "value": "#6E9FC4",
                "type": "color"
            },
            "500": {
                "value": "#4D81A8",
                "type": "color"
            },
            "600": {
                "value": "#416581",
                "type": "color"
            },
            "700": {
                "value": "#324A5C",
                "type": "color"
            },
            "800": {
                "value": "#24323D",
                "type": "color"
            },
            "900": {
                "value": "#182026",
                "type": "color"
            }
        }
    }
}

Palettes built on #428BC3

Color Lab

Pairs with #428BC3

UI roles & guardrails

In real applications

Scales

Every model

Export