What color is #278BB0?

#278BB0 is a medium cyan-blue. In RGB it is rgb(39, 139, 176), and in HSL hsl(196, 64%, 42%).

Is #278BB0 accessible as text?

On white, #278BB0 has a contrast ratio of 3.88:1 (fails WCAG AA for body text); on black it is 5.41:1 (passes). For text placed on #278BB0, use black for the best readability.

What is the closest Tailwind color to #278BB0?

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

What colors go well with #278BB0?

#278BB0 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #B04B27. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #278BB0 below.

Is #278BB0 good for buttons?

#278BB0 works well for buttons and highlights, but use black text on #278BB0 — white text only reaches 3.88:1, below the 4.5:1 needed for normal-size labels.

Is #278BB0 the same as CSS steelblue?

No — #278BB0 is not the CSS named color steelblue, but steelblue (#4682B4) is the closest CSS named color.

#278BB0 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #278BB0

Not just a swatch — here's how #278BB0 works with other colors. Named schemes with #278BB0 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #278BB0 Accent #A6C4BF Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Bondi 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 #278BB0 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #5EAFD2

Bondi 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 Bondi Blue.

Vintage Leather Lead · 5 colors

Lead #278BB0 Secondary #6F5216 Surface #E2DCC0 Accent #385244 Anchor #56233D

Bondi 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 #278BB0 Surface #EEE9D6 Anchor #592247 Accent #E4C2CC Secondary #322B30

Bondi 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 #278BB0 Secondary #93AFBC Support #969386 Ink #16140F

Bondi 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 Bondi Blue carrying the quiet middle.

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Color Lab

How #278BB0 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 19/100

Cool

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

Softness 50/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 40/100

Moderate

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

Naturalness 1/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 51/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 48/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 28/100

Low

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

UI accent fit 88/100

Very high

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

Surface fit 30/100

Low

Usable as a tinted surface in measured doses.

Print safety 73/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #278BB0

For UI

For branding

For interior

For fashion

People also use #278BB0 with

Medium Aquamarine Cobalt Blue Rust Platinum Dark Slate Gray

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 4.8:1. Use

Subtle surface Use #D4E8EF for cards and hover fills. Tint 80

Avoid beside #275DB0 — 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 #278BB0 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: #278BB0;
  --color-base-rgb: 39 139 176;
  --color-base-oklch: oklch(59.7% 0.104 227.9);
  --color-50: #F2FAFD;
  --color-100: #DDF1F8;
  --color-200: #BCE2F0;
  --color-300: #8ECBE1;
  --color-400: #64B2CE;
  --color-500: #4295B3;
  --color-600: #397389;
  --color-700: #2E5361;
  --color-800: #213840;
  --color-900: #162327;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  bondi-blue: {
    50: '#F2FAFD',
    100: '#DDF1F8',
    200: '#BCE2F0',
    300: '#8ECBE1',
    400: '#64B2CE',
    500: '#4295B3',
    600: '#397389',
    700: '#2E5361',
    800: '#213840',
    900: '#162327',
  },
}

$base: #278BB0;
$base-ink: #141310;
$base-50: #F2FAFD;
$base-100: #DDF1F8;
$base-200: #BCE2F0;
$base-300: #8ECBE1;
$base-400: #64B2CE;
$base-500: #4295B3;
$base-600: #397389;
$base-700: #2E5361;
$base-800: #213840;
$base-900: #162327;
$base-hover: #1F6F8D;
$base-subtle: #BDDDE8;

{
    "color": {
        "base": {
            "value": "#278BB0",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2FAFD",
                "type": "color"
            },
            "100": {
                "value": "#DDF1F8",
                "type": "color"
            },
            "200": {
                "value": "#BCE2F0",
                "type": "color"
            },
            "300": {
                "value": "#8ECBE1",
                "type": "color"
            },
            "400": {
                "value": "#64B2CE",
                "type": "color"
            },
            "500": {
                "value": "#4295B3",
                "type": "color"
            },
            "600": {
                "value": "#397389",
                "type": "color"
            },
            "700": {
                "value": "#2E5361",
                "type": "color"
            },
            "800": {
                "value": "#213840",
                "type": "color"
            },
            "900": {
                "value": "#162327",
                "type": "color"
            }
        }
    }
}

Palettes built on #278BB0

Color Lab

Pairs with #278BB0

UI roles & guardrails

In real applications

Scales

Every model

Export