#42B0CB#42B0CB

#42B0CB is a light, moderate cyan. Relative luminance 0.365; OKLCH L 70.6% C 0.105 H 217.2°. Best body text is #000000 at 8.30:1 contrast (WCAG AA passes).

Color values

HEX	#42B0CB
RGB	rgb(66, 176, 203)
HSL	hsl(192, 57%, 53%)
HSV	hsv(192, 67%, 80%)
CMYK	cmyk(67.5%, 13.3%, 0%, 20.4%)
CIE-LAB	lab(66.91, -22.54, -22.85)
CIE-LCH	lch(66.91, 32.09, 225.39°)
OKLab	oklab(70.58% -0.0837 -0.0636)
OKLCH	oklch(70.58% 0.105 217.2)
XYZ	xyz(28.5471, 36.5175, 62.0324)
Luminance	0.3652 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B0CB #CB5D42

analogous

#42CBA1 #42B0CB #426BCB

triadic

#42B0CB #CB42B0 #B0CB42

tetradic

#42B0CB #A142CB #CB5D42 #6BCB42

square

#42B0CB #A142CB #CB5D42 #6BCB42

split-complementary

#42B0CB #CB426B #CBA142

monochromatic

#206373 #2D8CA3 #42B0CB #72C4D8 #A2D8E5

Accessibility & contrast

On white

2.53

#42B0CB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.30

#42B0CB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B0CB

8.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B0CB	#FFFFFF	#000000	##000000
##42B0CB	1.00	2.53	8.30	8.30
#FFFFFF	2.53	1.00	21.00	21.00
#000000	8.30	21.00	1.00	1.00
##000000	8.30	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9EABCC

Deuteranopia (green-blind)

#8B9DCB

Tritanopia (blue-blind)

#00B9B8

Achromatopsia (no color)

#A3A3A3

Design tokens & code

CSS

--color: #42b0cb;
/* rgb */ color: rgb(66, 176, 203);
/* oklch */ color: oklch(70.6% 0.105 217.2);

Tailwind

colors: {
  custom: {
    50: '#87c7da',
    500: '#42b0cb',
    950: '#000000',
  },
}

SCSS

$custom: #42b0cb;
$custom-light: #87c7da;
$custom-dark: #000000;

JSON

{
  "hex": "#42b0cb",
  "rgb": {
    "r": 66,
    "g": 176,
    "b": 203
  },
  "hsl": {
    "h": 191.825,
    "s": 56.846,
    "l": 52.745
  },
  "oklch": {
    "l": 0.70579,
    "c": 0.10515,
    "h": 217.2
  },
  "luminance": 0.36521
}

Semantic roles & 50–950 ramp

primary

#42B0CB

secondary

#D2A297

accent

#6648E0

background

#F8FCFD

surface

#F0F8FA

border

#CBD1D3

text

#0D1315

muted

#7D8283

Preview Lab

Preview with #42B0CB

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

Preview Lab → · Contrast checker → · Palette generator →