#42B3CB#42B3CB

#42B3CB is a light, moderate cyan. Relative luminance 0.377; OKLCH L 71.3% C 0.105 H 214.6°. Best body text is #000000 at 8.54:1 contrast (WCAG AA passes).

Color values

HEX	#42B3CB
RGB	rgb(66, 179, 203)
HSL	hsl(191, 57%, 53%)
HSV	hsv(191, 67%, 80%)
CMYK	cmyk(67.5%, 11.8%, 0%, 20.4%)
CIE-LAB	lab(67.80, -24.07, -21.49)
CIE-LCH	lch(67.80, 32.26, 221.75°)
OKLab	oklab(71.29% -0.0868 -0.0598)
OKLCH	oklch(71.29% 0.105 214.6)
XYZ	xyz(29.1419, 37.7070, 62.2307)
Luminance	0.3771 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B3CB #CB5A42

analogous

#42CB9E #42B3CB #426ECB

triadic

#42B3CB #CB42B3 #B3CB42

tetradic

#42B3CB #9E42CB #CB5A42 #6ECB42

square

#42B3CB #9E42CB #CB5A42 #6ECB42

split-complementary

#42B3CB #CB426E #CB9E42

monochromatic

#206473 #2D8EA3 #42B3CB #72C6D8 #A2DAE5

Accessibility & contrast

On white

2.46

#42B3CB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.54

#42B3CB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B3CB

8.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B3CB	#FFFFFF	#000000	##000000
##42B3CB	1.00	2.46	8.54	8.54
#FFFFFF	2.46	1.00	21.00	21.00
#000000	8.54	21.00	1.00	1.00
##000000	8.54	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A2ADCC

Deuteranopia (green-blind)

#8E9FCB

Tritanopia (blue-blind)

#00BCBA

Achromatopsia (no color)

#A5A5A5

Design tokens & code

CSS

--color: #42b3cb;
/* rgb */ color: rgb(66, 179, 203);
/* oklch */ color: oklch(71.3% 0.105 214.6);

Tailwind

colors: {
  custom: {
    50: '#87cada',
    500: '#42b3cb',
    950: '#000000',
  },
}

SCSS

$custom: #42b3cb;
$custom-light: #87cada;
$custom-dark: #000000;

JSON

{
  "hex": "#42b3cb",
  "rgb": {
    "r": 66,
    "g": 179,
    "b": 203
  },
  "hsl": {
    "h": 190.511,
    "s": 56.846,
    "l": 52.745
  },
  "oklch": {
    "l": 0.71294,
    "c": 0.10537,
    "h": 214.6
  },
  "luminance": 0.3771
}

Semantic roles & 50–950 ramp

primary

#42B3CB

secondary

#D2A197

accent

#6248E0

background

#F8FCFD

surface

#F0F8FA

border

#CBD1D3

text

#0D1315

muted

#7D8283

Preview Lab

Preview with #42B3CB

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

Preview Lab → · Contrast checker → · Palette generator →