What color is #09C4E1?

#09C4E1 is a medium, vivid cyan. In RGB it is rgb(9, 196, 225), and in HSL hsl(188, 92%, 46%).

Is #09C4E1 accessible as text?

On white, #09C4E1 has a contrast ratio of 2.10:1 (fails WCAG AA for body text); on black it is 9.99:1 (passes). For text placed on #09C4E1, use black for the best readability.

What is the closest Tailwind color to #09C4E1?

The nearest Tailwind CSS token is cyan-500 (#00B8DB).

What colors go well with #09C4E1?

#09C4E1 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #E12609. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #09C4E1 below.

Is #09C4E1 good for buttons?

#09C4E1 works well for buttons and highlights, but use black text on #09C4E1 — white text only reaches 2.10:1, below the 4.5:1 needed for normal-size labels.

Is #09C4E1 the same as CSS darkturquoise?

No — #09C4E1 is not the CSS named color darkturquoise, but darkturquoise (#00CED1) is the closest CSS named color.

#09C4E1 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #09C4E1

Not just a swatch — here's how #09C4E1 works with other colors. Named schemes with #09C4E1 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #09C4E1 Accent #A6C4BE Surface #DFDABE Secondary #9AA0A0 Anchor #1E3549

Lagoon 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 #09C4E1 Secondary #AEB4B8 Surface #F1F2F0 Support #7A94A5 Anchor #2E3236

Lagoon 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 #09C4E1 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #6AEAFF

Lagoon 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 Lagoon Blue.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #09C4E1 Secondary #BAE5EF Support #969286 Ink #16140F

Lagoon 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 Lagoon Blue carrying the quiet middle.

Modern Café Dominant · 5 colors

Dominant #09C4E1 Anchor #372C1D Surface #EBE5D0 Accent #7E9D74 Secondary #3A3933

Lagoon 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 #09C4E1 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 13/100

Cool

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

Softness 57/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 25/100

Low

Airy and open — recedes, leaves the composition light.

Naturalness 4/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 33/100

Low

A faint retro warmth without tipping into sepia.

Luxury 32/100

Low

Understated — leans refined without going austere.

Brand distinctiveness 51/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 42/100

Moderate

Workable accent with care around contrast.

Surface fit 37/100

Low

Usable as a tinted surface in measured doses.

Print safety 65/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #09C4E1

For UI

For branding

For interior

For fashion

People also use #09C4E1 with

Medium Spring Green Neon Blue Mahogany Platinum Dark Slate Gray

UI roles & guardrails

Primary action Safe as a filled button with near-black label. AAA

Body text Do not use for body copy on light surfaces. Avoid

Large display Only on dark surfaces. Avoid

Background Pair with #141310 text at 8.8:1. Use

Subtle surface Use #D1F1F6 for cards and hover fills. Tint 80

Avoid beside #097CE1 — 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 #09C4E1 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: #09C4E1;
  --color-base-rgb: 9 196 225;
  --color-base-oklch: oklch(75.4% 0.131 213.4);
  --color-50: #F0FDFE;
  --color-100: #D8F8FD;
  --color-200: #B1F2FC;
  --color-300: #7CE3F3;
  --color-400: #4DD1E5;
  --color-500: #29B6CB;
  --color-600: #288B9A;
  --color-700: #22636D;
  --color-800: #1A4147;
  --color-900: #12282B;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  lagoon-blue: {
    50: '#F0FDFE',
    100: '#D8F8FD',
    200: '#B1F2FC',
    300: '#7CE3F3',
    400: '#4DD1E5',
    500: '#29B6CB',
    600: '#288B9A',
    700: '#22636D',
    800: '#1A4147',
    900: '#12282B',
  },
}

$base: #09C4E1;
$base-ink: #141310;
$base-50: #F0FDFE;
$base-100: #D8F8FD;
$base-200: #B1F2FC;
$base-300: #7CE3F3;
$base-400: #4DD1E5;
$base-500: #29B6CB;
$base-600: #288B9A;
$base-700: #22636D;
$base-800: #1A4147;
$base-900: #12282B;
$base-hover: #089DB4;
$base-subtle: #B9EBF3;

{
    "color": {
        "base": {
            "value": "#09C4E1",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FDFE",
                "type": "color"
            },
            "100": {
                "value": "#D8F8FD",
                "type": "color"
            },
            "200": {
                "value": "#B1F2FC",
                "type": "color"
            },
            "300": {
                "value": "#7CE3F3",
                "type": "color"
            },
            "400": {
                "value": "#4DD1E5",
                "type": "color"
            },
            "500": {
                "value": "#29B6CB",
                "type": "color"
            },
            "600": {
                "value": "#288B9A",
                "type": "color"
            },
            "700": {
                "value": "#22636D",
                "type": "color"
            },
            "800": {
                "value": "#1A4147",
                "type": "color"
            },
            "900": {
                "value": "#12282B",
                "type": "color"
            }
        }
    }
}

Palettes built on #09C4E1

Color Lab

Pairs with #09C4E1

UI roles & guardrails

In real applications

Scales

Every model

Export