#42B2CB#42B2CB

#42B2CB is a light, moderate cyan. Relative luminance 0.373; OKLCH L 71.1% C 0.105 H 215.5°. Best body text is #000000 at 8.46:1 contrast (WCAG AA passes).

Color values

HEX	#42B2CB
RGB	rgb(66, 178, 203)
HSL	hsl(191, 57%, 53%)
HSV	hsv(191, 67%, 80%)
CMYK	cmyk(67.5%, 12.3%, 0%, 20.4%)
CIE-LAB	lab(67.51, -23.56, -21.94)
CIE-LCH	lch(67.51, 32.19, 222.96°)
OKLab	oklab(71.06% -0.0857 -0.0611)
OKLCH	oklch(71.06% 0.105 215.5)
XYZ	xyz(28.9422, 37.3076, 62.1641)
Luminance	0.3731 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B2CB #CB5B42

analogous

#42CB9F #42B2CB #426DCB

triadic

#42B2CB #CB42B2 #B2CB42

tetradic

#42B2CB #9F42CB #CB5B42 #6DCB42

square

#42B2CB #9F42CB #CB5B42 #6DCB42

split-complementary

#42B2CB #CB426D #CB9F42

monochromatic

#206473 #2D8DA3 #42B2CB #72C6D8 #A2D9E5

Accessibility & contrast

On white

2.48

#42B2CB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.46

#42B2CB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B2CB

8.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B2CB	#FFFFFF	#000000	##000000
##42B2CB	1.00	2.48	8.46	8.46
#FFFFFF	2.48	1.00	21.00	21.00
#000000	8.46	21.00	1.00	1.00
##000000	8.46	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A1ADCC

Deuteranopia (green-blind)

#8D9ECB

Tritanopia (blue-blind)

#00BBBA

Achromatopsia (no color)

#A4A4A4

Design tokens & code

CSS

--color: #42b2cb;
/* rgb */ color: rgb(66, 178, 203);
/* oklch */ color: oklch(71.1% 0.105 215.5);

Tailwind

colors: {
  custom: {
    50: '#87c9da',
    500: '#42b2cb',
    950: '#000000',
  },
}

SCSS

$custom: #42b2cb;
$custom-light: #87c9da;
$custom-dark: #000000;

JSON

{
  "hex": "#42b2cb",
  "rgb": {
    "r": 66,
    "g": 178,
    "b": 203
  },
  "hsl": {
    "h": 190.949,
    "s": 56.846,
    "l": 52.745
  },
  "oklch": {
    "l": 0.71056,
    "c": 0.10527,
    "h": 215.5
  },
  "luminance": 0.37311
}

Semantic roles & 50–950 ramp

primary

#42B2CB

secondary

#D2A297

accent

#6448E0

background

#F8FCFD

surface

#F0F8FA

border

#CBD1D3

text

#0D1315

muted

#7D8283

Preview Lab

Preview with #42B2CB

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

Preview Lab → · Contrast checker → · Palette generator →