What color is #66CFEC?

#66CFEC is a light, vivid cyan. In RGB it is rgb(102, 207, 236), and in HSL hsl(193, 78%, 66%).

Is #66CFEC accessible as text?

On white, #66CFEC has a contrast ratio of 1.79:1 (fails WCAG AA for body text); on black it is 11.70:1 (passes). For text placed on #66CFEC, use black for the best readability.

What is the closest Tailwind color to #66CFEC?

The nearest Tailwind CSS token is sky-300 (#74D4FF).

What colors go well with #66CFEC?

#66CFEC pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #EC8265. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #66CFEC below.

Is #66CFEC good for buttons?

#66CFEC works well for buttons and highlights, but use black text on #66CFEC — white text only reaches 1.79:1, below the 4.5:1 needed for normal-size labels.

Is #66CFEC the same as CSS skyblue?

No — #66CFEC is not the CSS named color skyblue, but skyblue (#87CEEB) is the closest CSS named color.

#66CFEC Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #66CFEC

Not just a swatch — here's how #66CFEC works with other colors. Named schemes with #66CFEC in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #66CFEC Accent #A6C4BF Surface #DFDABF Secondary #9AA0A0 Anchor #1E3549

Bright Sky 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 #66CFEC Secondary #AEB4B8 Surface #F1F2F0 Support #7B94A5 Anchor #2E3236

Bright Sky 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 #66CFEC Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #9AF5FF

Bright Sky is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Bright Sky.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #66CFEC Secondary #D2F3FD Support #969386 Ink #16140F

Bright Sky 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 Bright Sky carrying the quiet middle.

Modern Café Dominant · 5 colors

Dominant #66CFEC Anchor #372C1D Surface #EBE5D0 Accent #7D9D74 Secondary #393933

Bright Sky 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 #66CFEC 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 65/100

High

Soft and easy on the eye — gentle backdrops, calm surfaces.

Depth 20/100

Very low

Airy and open — recedes, leaves the composition light.

Naturalness 2/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 34/100

Low

A faint retro warmth without tipping into sepia.

Luxury 27/100

Low

Understated — leans refined without going austere.

Brand distinctiveness 41/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 26/100

Low

Weak as an action color — too pale, too dark or too muted to signal.

Surface fit 49/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 72/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #66CFEC

For UI

For branding

For interior

For fashion

People also use #66CFEC with

Seafoam Green Cornflower Blue Light Coral 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 10.4:1. Use

Subtle surface Use #E4F3F7 for cards and hover fills. Tint 80

Avoid beside #65A2EC — 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 #66CFEC 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: #66CFEC;
  --color-base-rgb: 102 207 236;
  --color-base-oklch: oklch(80.3% 0.105 218.4);
  --color-50: #F1FBFE;
  --color-100: #DAF4FB;
  --color-200: #B6E8F6;
  --color-300: #85D4EA;
  --color-400: #58BEDA;
  --color-500: #36A1BF;
  --color-600: #307C91;
  --color-700: #285967;
  --color-800: #1E3B43;
  --color-900: #142529;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  bright-sky: {
    50: '#F1FBFE',
    100: '#DAF4FB',
    200: '#B6E8F6',
    300: '#85D4EA',
    400: '#58BEDA',
    500: '#36A1BF',
    600: '#307C91',
    700: '#285967',
    800: '#1E3B43',
    900: '#142529',
  },
}

$base: #66CFEC;
$base-ink: #141310;
$base-50: #F1FBFE;
$base-100: #DAF4FB;
$base-200: #B6E8F6;
$base-300: #85D4EA;
$base-400: #58BEDA;
$base-500: #36A1BF;
$base-600: #307C91;
$base-700: #285967;
$base-800: #1E3B43;
$base-900: #142529;
$base-hover: #29BCE5;
$base-subtle: #D6EEF4;

{
    "color": {
        "base": {
            "value": "#66CFEC",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1FBFE",
                "type": "color"
            },
            "100": {
                "value": "#DAF4FB",
                "type": "color"
            },
            "200": {
                "value": "#B6E8F6",
                "type": "color"
            },
            "300": {
                "value": "#85D4EA",
                "type": "color"
            },
            "400": {
                "value": "#58BEDA",
                "type": "color"
            },
            "500": {
                "value": "#36A1BF",
                "type": "color"
            },
            "600": {
                "value": "#307C91",
                "type": "color"
            },
            "700": {
                "value": "#285967",
                "type": "color"
            },
            "800": {
                "value": "#1E3B43",
                "type": "color"
            },
            "900": {
                "value": "#142529",
                "type": "color"
            }
        }
    }
}