What color is #129BB9?

#129BB9 is a medium, vivid cyan. In RGB it is rgb(18, 155, 185), and in HSL hsl(191, 82%, 40%).

Is #129BB9 accessible as text?

On white, #129BB9 has a contrast ratio of 3.27:1 (fails WCAG AA for body text); on black it is 6.41:1 (passes). For text placed on #129BB9, use black for the best readability.

What is the closest Tailwind color to #129BB9?

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

What colors go well with #129BB9?

#129BB9 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #BA3112. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #129BB9 below.

Is #129BB9 good for buttons?

#129BB9 works well for buttons and highlights, but use black text on #129BB9 — white text only reaches 3.27:1, below the 4.5:1 needed for normal-size labels.

Is #129BB9 the same as CSS cadetblue?

No — #129BB9 is not the CSS named color cadetblue, but cadetblue (#5F9EA0) is the closest CSS named color.

#129BB9 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #129BB9

Not just a swatch — here's how #129BB9 works with other colors. Named schemes with #129BB9 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #129BB9 Accent #A6C4BF Surface #DFDABF Secondary #9AA0A0 Anchor #1E354A

Bondi Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Nordic Calm Accent · 5 colors

Accent #129BB9 Secondary #AEB4B8 Surface #F1F2F0 Support #7B94A5 Anchor #2E3236

Bondi Blue keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Tech Product Signal · 5 colors

Signal #129BB9 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #5CC0DB

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.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #129BB9 Secondary #9CBDC8 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.

Modern Café Dominant · 5 colors

Dominant #129BB9 Anchor #372C1D Surface #EBE5D0 Accent #7D9D74 Secondary #393933

Bondi Blue anchors this café scheme as the warm mid-tone, lifted by latte cream and a muted sage accent and grounded by espresso brown and a warm charcoal.

Build a working theme in the generator →

Color Lab

How #129BB9 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 52/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 36/100

Low

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

Naturalness 2/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 46/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 44/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 43/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 79/100

High

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

Surface fit 32/100

Low

Usable as a tinted surface in measured doses.

Print safety 70/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #129BB9

For UI

For branding

For interior

For fashion

People also use #129BB9 with

Emerald Green 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 5.7:1. Use

Subtle surface Use #CEECF2 for cards and hover fills. Tint 80

Avoid beside #1263BA — 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 #129BB9 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: #129BB9;
  --color-base-rgb: 18 155 185;
  --color-base-oklch: oklch(63.8% 0.112 218.6);
  --color-50: #F0FCFE;
  --color-100: #D9F6FC;
  --color-200: #B5EBF8;
  --color-300: #83D9ED;
  --color-400: #55C4DD;
  --color-500: #32A8C3;
  --color-600: #2E8194;
  --color-700: #265C69;
  --color-800: #1D3D44;
  --color-900: #14262A;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  bondi-blue: {
    50: '#F0FCFE',
    100: '#D9F6FC',
    200: '#B5EBF8',
    300: '#83D9ED',
    400: '#55C4DD',
    500: '#32A8C3',
    600: '#2E8194',
    700: '#265C69',
    800: '#1D3D44',
    900: '#14262A',
  },
}

$base: #129BB9;
$base-ink: #141310;
$base-50: #F0FCFE;
$base-100: #D9F6FC;
$base-200: #B5EBF8;
$base-300: #83D9ED;
$base-400: #55C4DD;
$base-500: #32A8C3;
$base-600: #2E8194;
$base-700: #265C69;
$base-800: #1D3D44;
$base-900: #14262A;
$base-hover: #0F7C95;
$base-subtle: #B4E3EE;

{
    "color": {
        "base": {
            "value": "#129BB9",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FCFE",
                "type": "color"
            },
            "100": {
                "value": "#D9F6FC",
                "type": "color"
            },
            "200": {
                "value": "#B5EBF8",
                "type": "color"
            },
            "300": {
                "value": "#83D9ED",
                "type": "color"
            },
            "400": {
                "value": "#55C4DD",
                "type": "color"
            },
            "500": {
                "value": "#32A8C3",
                "type": "color"
            },
            "600": {
                "value": "#2E8194",
                "type": "color"
            },
            "700": {
                "value": "#265C69",
                "type": "color"
            },
            "800": {
                "value": "#1D3D44",
                "type": "color"
            },
            "900": {
                "value": "#14262A",
                "type": "color"
            }
        }
    }
}

Palettes built on #129BB9

Color Lab

Pairs with #129BB9

UI roles & guardrails

In real applications

Scales

Every model

Export