#42C8EA#42C8EA

#42C8EA is a light, vivid cyan. Relative luminance 0.484; OKLCH L 77.5% C 0.122 H 218.6°. Best body text is #000000 at 10.68:1 contrast (WCAG AA passes).

Color values

HEX	#42C8EA
RGB	rgb(66, 200, 234)
HSL	hsl(192, 80%, 59%)
HSV	hsv(192, 72%, 92%)
CMYK	cmyk(71.8%, 14.5%, 0%, 8.2%)
CIE-LAB	lab(75.08, -25.06, -27.25)
CIE-LCH	lch(75.08, 37.02, 227.40°)
OKLab	oklab(77.51% -0.0954 -0.0761)
OKLCH	oklch(77.51% 0.122 218.6)
XYZ	xyz(37.7461, 48.4029, 85.1793)
Luminance	0.4841 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42C8EA #EA6442

analogous

#42EAB8 #42C8EA #4274EA

triadic

#42C8EA #EA42C8 #C8EA42

tetradic

#42C8EA #B842EA #EA6442 #74EA42

square

#42C8EA #B842EA #EA6442 #74EA42

split-complementary

#42C8EA #EA4274 #EAB842

monochromatic

#1283A0 #18B0D7 #42C8EA #79D8F0 #B0E8F6

Accessibility & contrast

On white

1.97

#42C8EA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.68

#42C8EA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42C8EA

10.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42C8EA	#FFFFFF	#000000	##000000
##42C8EA	1.00	1.97	10.68	10.68
#FFFFFF	1.97	1.00	21.00	21.00
#000000	10.68	21.00	1.00	1.00
##000000	10.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B2C2EC

Deuteranopia (green-blind)

#9BB2EA

Tritanopia (blue-blind)

#00D3D3

Achromatopsia (no color)

#B9B9B9

Design tokens & code

CSS

--color: #42c8ea;
/* rgb */ color: rgb(66, 200, 234);
/* oklch */ color: oklch(77.5% 0.122 218.6);

Tailwind

colors: {
  custom: {
    50: '#8cd9f0',
    500: '#42c8ea',
    950: '#000000',
  },
}

SCSS

$custom: #42c8ea;
$custom-light: #8cd9f0;
$custom-dark: #000000;

JSON

{
  "hex": "#42c8ea",
  "rgb": {
    "r": 66,
    "g": 200,
    "b": 234
  },
  "hsl": {
    "h": 192.143,
    "s": 80,
    "l": 58.824
  },
  "oklch": {
    "l": 0.77508,
    "c": 0.12204,
    "h": 218.6
  },
  "luminance": 0.48407
}

Semantic roles & 50–950 ramp

primary

#42C8EA

secondary

#E5B0A3

accent

#5931F6

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #42C8EA

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →