#42B2CC#42B2CC

#42B2CC is a light, moderate cyan. Relative luminance 0.374; OKLCH L 71.1% C 0.106 H 216.2°. Best body text is #000000 at 8.47:1 contrast (WCAG AA passes).

Color values

HEX	#42B2CC
RGB	rgb(66, 178, 204)
HSL	hsl(191, 58%, 53%)
HSV	hsv(191, 68%, 80%)
CMYK	cmyk(67.6%, 12.7%, 0%, 20%)
CIE-LAB	lab(67.54, -23.25, -22.44)
CIE-LCH	lch(67.54, 32.31, 223.98°)
OKLab	oklab(71.1% -0.0853 -0.0625)
OKLCH	oklch(71.1% 0.106 216.2)
XYZ	xyz(29.0617, 37.3554, 62.7937)
Luminance	0.3736 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B2CC #CC5C42

analogous

#42CCA1 #42B2CC #426DCC

triadic

#42B2CC #CC42B2 #B2CC42

tetradic

#42B2CC #A142CC #CC5C42 #6DCC42

square

#42B2CC #A142CC #CC5C42 #6DCC42

split-complementary

#42B2CC #CC426D #CCA142

monochromatic

#1F6474 #2C8EA4 #42B2CC #72C6D9 #A2D9E6

Accessibility & contrast

On white

2.48

#42B2CC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.47

#42B2CC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B2CC

8.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B2CC	#FFFFFF	#000000	##000000
##42B2CC	1.00	2.48	8.47	8.47
#FFFFFF	2.48	1.00	21.00	21.00
#000000	8.47	21.00	1.00	1.00
##000000	8.47	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A0ADCD

Deuteranopia (green-blind)

#8D9ECC

Tritanopia (blue-blind)

#00BBBA

Achromatopsia (no color)

#A4A4A4

Design tokens & code

CSS

--color: #42b2cc;
/* rgb */ color: rgb(66, 178, 204);
/* oklch */ color: oklch(71.1% 0.106 216.2);

Tailwind

colors: {
  custom: {
    50: '#87c9db',
    500: '#42b2cc',
    950: '#000000',
  },
}

SCSS

$custom: #42b2cc;
$custom-light: #87c9db;
$custom-dark: #000000;

JSON

{
  "hex": "#42b2cc",
  "rgb": {
    "r": 66,
    "g": 178,
    "b": 204
  },
  "hsl": {
    "h": 191.304,
    "s": 57.5,
    "l": 52.941
  },
  "oklch": {
    "l": 0.71096,
    "c": 0.10577,
    "h": 216.2
  },
  "luminance": 0.37359
}

Semantic roles & 50–950 ramp

primary

#42B2CC

secondary

#D3A297

accent

#6447E1

background

#F8FCFD

surface

#F0F8FB

border

#CBD1D4

text

#0D1315

muted

#7D8283

Preview Lab

Preview with #42B2CC

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

Preview Lab → · Contrast checker → · Palette generator →