#42C3EA#42C3EA

#42C3EA is a light, vivid cyan. Relative luminance 0.461; OKLCH L 76.3% C 0.123 H 222.3°. Best body text is #000000 at 10.23:1 contrast (WCAG AA passes).

Color values

HEX	#42C3EA
RGB	rgb(66, 195, 234)
HSL	hsl(194, 80%, 59%)
HSV	hsv(194, 72%, 92%)
CMYK	cmyk(71.8%, 16.7%, 0%, 8.2%)
CIE-LAB	lab(73.63, -22.54, -29.48)
CIE-LCH	lch(73.63, 37.11, 232.61°)
OKLab	oklab(76.34% -0.0906 -0.0824)
OKLCH	oklch(76.34% 0.123 222.3)
XYZ	xyz(36.6070, 46.1247, 84.7996)
Luminance	0.4613 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42C3EA #EA6942

analogous

#42EABD #42C3EA #426FEA

triadic

#42C3EA #EA42C3 #C3EA42

tetradic

#42C3EA #BD42EA #EA6942 #6FEA42

square

#42C3EA #BD42EA #EA6942 #6FEA42

split-complementary

#42C3EA #EA426F #EABD42

monochromatic

#127FA0 #18ABD7 #42C3EA #79D4F0 #B0E6F6

Accessibility & contrast

On white

2.05

#42C3EA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.23

#42C3EA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42C3EA

10.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42C3EA	#FFFFFF	#000000	##000000
##42C3EA	1.00	2.05	10.23	10.23
#FFFFFF	2.05	1.00	21.00	21.00
#000000	10.23	21.00	1.00	1.00
##000000	10.23	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ACBEEC

Deuteranopia (green-blind)

#95AEEA

Tritanopia (blue-blind)

#00CFD0

Achromatopsia (no color)

#B5B5B5

Design tokens & code

CSS

--color: #42c3ea;
/* rgb */ color: rgb(66, 195, 234);
/* oklch */ color: oklch(76.3% 0.123 222.3);

Tailwind

colors: {
  custom: {
    50: '#8cd5f0',
    500: '#42c3ea',
    950: '#000000',
  },
}

SCSS

$custom: #42c3ea;
$custom-light: #8cd5f0;
$custom-dark: #000000;

JSON

{
  "hex": "#42c3ea",
  "rgb": {
    "r": 66,
    "g": 195,
    "b": 234
  },
  "hsl": {
    "h": 193.929,
    "s": 80,
    "l": 58.824
  },
  "oklch": {
    "l": 0.76343,
    "c": 0.12252,
    "h": 222.3
  },
  "luminance": 0.46129
}

Semantic roles & 50–950 ramp

primary

#42C3EA

secondary

#E5B2A3

accent

#5F31F6

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #42C3EA

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

Preview Lab → · Contrast checker → · Palette generator →