What color is #129DC4?

#129DC4 is a medium, vivid cyan. In RGB it is rgb(18, 157, 196), and in HSL hsl(193, 83%, 42%).

Is #129DC4 accessible as text?

On white, #129DC4 has a contrast ratio of 3.16:1 (fails WCAG AA for body text); on black it is 6.65:1 (passes). For text placed on #129DC4, use black for the best readability.

What is the closest Tailwind color to #129DC4?

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

What colors go well with #129DC4?

#129DC4 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #C43912. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #129DC4 below.

Is #129DC4 good for buttons?

#129DC4 works well for buttons and highlights, but use black text on #129DC4 — white text only reaches 3.16:1, below the 4.5:1 needed for normal-size labels.

Is #129DC4 the same as CSS cadetblue?

No — #129DC4 is not the CSS named color cadetblue, but cadetblue (#5F9EA0) is the closest CSS named color.

#129DC4 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #129DC4

Not just a swatch — here's how #129DC4 works with other colors. Named schemes with #129DC4 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #129DC4 Accent #A6C4BF Surface #DEDABF Secondary #9AA0A0 Anchor #1E344A

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 #129DC4 Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A5 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 #129DC4 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #5DC2E6

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 #129DC4 Secondary #9EC0CE 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 #129DC4 Anchor #372C1D Surface #EBE5D0 Accent #7D9D75 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 #129DC4 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 15/100

Cool

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

Softness 51/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 36/100

Low

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

Naturalness 1/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 43/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 43/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 46/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 77/100

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 68/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #129DC4

For UI

For branding

For interior

For fashion

People also use #129DC4 with

Medium Spring 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 5.9:1. Use

Subtle surface Use #D0EBF3 for cards and hover fills. Tint 80

Avoid beside #1262C4 — 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 #129DC4 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: #129DC4;
  --color-base-rgb: 18 157 196;
  --color-base-oklch: oklch(64.8% 0.119 224.3);
  --color-50: #F0FBFE;
  --color-100: #D9F5FD;
  --color-200: #B4E9F8;
  --color-300: #82D6ED;
  --color-400: #54C0DE;
  --color-500: #31A4C3;
  --color-600: #2D7E95;
  --color-700: #265A69;
  --color-800: #1C3C44;
  --color-900: #13252A;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  bondi-blue: {
    50: '#F0FBFE',
    100: '#D9F5FD',
    200: '#B4E9F8',
    300: '#82D6ED',
    400: '#54C0DE',
    500: '#31A4C3',
    600: '#2D7E95',
    700: '#265A69',
    800: '#1C3C44',
    900: '#13252A',
  },
}

$base: #129DC4;
$base-ink: #141310;
$base-50: #F0FBFE;
$base-100: #D9F5FD;
$base-200: #B4E9F8;
$base-300: #82D6ED;
$base-400: #54C0DE;
$base-500: #31A4C3;
$base-600: #2D7E95;
$base-700: #265A69;
$base-800: #1C3C44;
$base-900: #13252A;
$base-hover: #0F7E9D;
$base-subtle: #B7E2EF;

{
    "color": {
        "base": {
            "value": "#129DC4",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FBFE",
                "type": "color"
            },
            "100": {
                "value": "#D9F5FD",
                "type": "color"
            },
            "200": {
                "value": "#B4E9F8",
                "type": "color"
            },
            "300": {
                "value": "#82D6ED",
                "type": "color"
            },
            "400": {
                "value": "#54C0DE",
                "type": "color"
            },
            "500": {
                "value": "#31A4C3",
                "type": "color"
            },
            "600": {
                "value": "#2D7E95",
                "type": "color"
            },
            "700": {
                "value": "#265A69",
                "type": "color"
            },
            "800": {
                "value": "#1C3C44",
                "type": "color"
            },
            "900": {
                "value": "#13252A",
                "type": "color"
            }
        }
    }
}

Palettes built on #129DC4

Color Lab

Pairs with #129DC4

UI roles & guardrails

In real applications

Scales

Every model

Export