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#42ebff

a balanced, electric cyan · cool · closest name: cyan

RGB
66, 235, 255
HSL
186°, 100%, 63%
CMYK
74, 8, 0, 0
Luminance
0.6779

Every format

HEX#42ebff
RGBrgb(66, 235, 255)
HSLhsl(186, 100%, 63%)
CMYKcmyk(74%, 8%, 0%, 0%)
LABlab(85.9 -35.6 -21.9)
LCHlch(85.9 41.8 211.6)
OKLCHoklch(0.865 0.135 206.9)

Copy-ready code

/* CSS */
color: #42ebff;
background-color: #42ebff;
/* Tailwind (arbitrary) */
class="text-[#42ebff] bg-[#42ebff]"
/* SCSS */
$brand: #42ebff;
/* SwiftUI */
Color(red: 0.259, green: 0.922, blue: 1.000)
/* Android */
Color.parseColor("#42ebff")

Accessibility — WCAG contrast

Aa
#42ebff on white: 1.44:1
AA ✗ fail · AA-large · AAA
Aa
#42ebff on black: 14.56:1
AA ✓ pass · AA-large · AAA
true color
protanopia
deuteranopia
tritanopia

RGB percentages

Red25.9%
Green92.2%
Blue100.0%

CMYK percentages

Cyan74.1%
Magenta7.8%
Yellow0.0%
Key (black)0.0%

Color previews

#42ebff text on a black background

contrast 14.56:1

Card sample

#42ebff text on a white background

contrast 1.44:1

Card sample

CSS3 live lab

Text font color

The quick brown fox

color: #42ebff;
Background color
Panel with #42ebff background
background-color: #42ebff;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #42ebff;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(66, 235, 255, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(66, 235, 255, 0.45);
Border & gradient
Gradient panel
border: 3px solid #42ebff;
background: linear-gradient(135deg, #42ebff, #426DFF);

Monochromatic scale

Palettes built from #42ebff

Shades — darker

Tints — lighter

Hue & tone neighbors

Color harmonies

Nearest named colors

Work with #42ebff in the Color Lab