What color is #178CB3?

#178CB3 is a medium, vivid cyan. In RGB it is rgb(23, 140, 179), and in HSL hsl(195, 77%, 40%).

Is #178CB3 accessible as text?

On white, #178CB3 has a contrast ratio of 3.86:1 (fails WCAG AA for body text); on black it is 5.44:1 (passes). For text placed on #178CB3, use black for the best readability.

What is the closest Tailwind color to #178CB3?

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

What colors go well with #178CB3?

#178CB3 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #B53F17. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #178CB3 below.

Is #178CB3 good for buttons?

#178CB3 works well for buttons and highlights, but use black text on #178CB3 — white text only reaches 3.86:1, below the 4.5:1 needed for normal-size labels.

Is #178CB3 the same as CSS steelblue?

No — #178CB3 is not the CSS named color steelblue, but steelblue (#4682B4) is the closest CSS named color.

#178CB3 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #178CB3

Not just a swatch — here's how #178CB3 works with other colors. Named schemes with #178CB3 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #178CB3 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 #178CB3 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #58B1D5

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 #178CB3 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 #178CB3 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 #178CB3 Secondary #91B0BE 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.

Build a working theme in the generator →

Color Lab

How #178CB3 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 17/100

Cool

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

Softness 49/100

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 49/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 48/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 30/100

Low

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

UI accent fit 89/100

Very high

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

Surface fit 28/100

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 #178CB3

For UI

For branding

For interior

For fashion

People also use #178CB3 with

Emerald Green Egyptian 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 #CFE9F1 for cards and hover fills. Tint 80

Avoid beside #1759B5 — 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 #178CB3 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: #178CB3;
  --color-base-rgb: 23 140 179;
  --color-base-oklch: oklch(59.8% 0.111 227.4);
  --color-50: #F1FBFE;
  --color-100: #DAF3FB;
  --color-200: #B7E6F5;
  --color-300: #86D0E9;
  --color-400: #59B9D9;
  --color-500: #379CBE;
  --color-600: #317991;
  --color-700: #285766;
  --color-800: #1E3A43;
  --color-900: #142429;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  bondi-blue: {
    50: '#F1FBFE',
    100: '#DAF3FB',
    200: '#B7E6F5',
    300: '#86D0E9',
    400: '#59B9D9',
    500: '#379CBE',
    600: '#317991',
    700: '#285766',
    800: '#1E3A43',
    900: '#142429',
  },
}

$base: #178CB3;
$base-ink: #141310;
$base-50: #F1FBFE;
$base-100: #DAF3FB;
$base-200: #B7E6F5;
$base-300: #86D0E9;
$base-400: #59B9D9;
$base-500: #379CBE;
$base-600: #317991;
$base-700: #285766;
$base-800: #1E3A43;
$base-900: #142429;
$base-hover: #137190;
$base-subtle: #B6DFEC;

{
    "color": {
        "base": {
            "value": "#178CB3",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1FBFE",
                "type": "color"
            },
            "100": {
                "value": "#DAF3FB",
                "type": "color"
            },
            "200": {
                "value": "#B7E6F5",
                "type": "color"
            },
            "300": {
                "value": "#86D0E9",
                "type": "color"
            },
            "400": {
                "value": "#59B9D9",
                "type": "color"
            },
            "500": {
                "value": "#379CBE",
                "type": "color"
            },
            "600": {
                "value": "#317991",
                "type": "color"
            },
            "700": {
                "value": "#285766",
                "type": "color"
            },
            "800": {
                "value": "#1E3A43",
                "type": "color"
            },
            "900": {
                "value": "#142429",
                "type": "color"
            }
        }
    }
}

Palettes built on #178CB3

Color Lab

Pairs with #178CB3

UI roles & guardrails

In real applications

Scales

Every model

Export