#42ADE2#42ADE2

#42ADE2 is a light, vivid cyan. Relative luminance 0.365; OKLCH L 70.9% C 0.123 H 234.1°. Best body text is #000000 at 8.31:1 contrast (WCAG AA passes).

Color values

HEX	#42ADE2
RGB	rgb(66, 173, 226)
HSL	hsl(200, 73%, 57%)
HSV	hsv(200, 71%, 89%)
CMYK	cmyk(70.8%, 23.5%, 0%, 11.4%)
CIE-LAB	lab(66.93, -13.59, -35.49)
CIE-LCH	lch(66.93, 38.00, 249.05°)
OKLab	oklab(70.88% -0.0723 -0.0998)
OKLCH	oklch(70.88% 0.123 234.1)
XYZ	xyz(30.9124, 36.5329, 77.3591)
Luminance	0.3654 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42ADE2 #E27742

analogous

#42E2C7 #42ADE2 #425DE2

triadic

#42ADE2 #E242AD #ADE242

tetradic

#42ADE2 #C742E2 #E27742 #5DE242

square

#42ADE2 #C742E2 #E27742 #5DE242

split-complementary

#42ADE2 #E2425D #E2C742

monochromatic

#176A93 #1F90C8 #42ADE2 #77C4EA #ACDBF2

Accessibility & contrast

On white

2.53

#42ADE2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.31

#42ADE2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42ADE2

8.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42ADE2	#FFFFFF	#000000	##000000
##42ADE2	1.00	2.53	8.31	8.31
#FFFFFF	2.53	1.00	21.00	21.00
#000000	8.31	21.00	1.00	1.00
##000000	8.31	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#93ACE5

Deuteranopia (green-blind)

#7D9CE1

Tritanopia (blue-blind)

#00BBBF

Achromatopsia (no color)

#A3A3A3

Design tokens & code

CSS

--color: #42ade2;
/* rgb */ color: rgb(66, 173, 226);
/* oklch */ color: oklch(70.9% 0.123 234.1);

Tailwind

colors: {
  custom: {
    50: '#89c5eb',
    500: '#42ade2',
    950: '#000000',
  },
}

SCSS

$custom: #42ade2;
$custom-light: #89c5eb;
$custom-dark: #000000;

JSON

{
  "hex": "#42ade2",
  "rgb": {
    "r": 66,
    "g": 173,
    "b": 226
  },
  "hsl": {
    "h": 199.875,
    "s": 73.394,
    "l": 57.255
  },
  "oklch": {
    "l": 0.70883,
    "c": 0.12325,
    "h": 234.1
  },
  "luminance": 0.36536
}

Semantic roles & 50–950 ramp

primary

#42ADE2

secondary

#E0B59F

accent

#7538F0

background

#F9FCFE

surface

#F1F8FD

border

#CBD1D5

text

#0D1216

muted

#7E8184

Preview Lab

Preview with #42ADE2

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

Preview Lab → · Contrast checker → · Palette generator →