#42B0CA#42B0CA

#42B0CA is a light, moderate cyan. Relative luminance 0.365; OKLCH L 70.5% C 0.105 H 216.5°. Best body text is #000000 at 8.29:1 contrast (WCAG AA passes).

Color values

HEX	#42B0CA
RGB	rgb(66, 176, 202)
HSL	hsl(191, 56%, 53%)
HSV	hsv(191, 67%, 79%)
CMYK	cmyk(67.3%, 12.9%, 0%, 20.8%)
CIE-LAB	lab(66.88, -22.85, -22.35)
CIE-LCH	lch(66.88, 31.96, 224.36°)
OKLab	oklab(70.54% -0.0841 -0.0622)
OKLCH	oklch(70.54% 0.105 216.5)
XYZ	xyz(28.4283, 36.4700, 61.4068)
Luminance	0.3647 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B0CA #CA5C42

analogous

#42CAA0 #42B0CA #426CCA

triadic

#42B0CA #CA42B0 #B0CA42

tetradic

#42B0CA #A042CA #CA5C42 #6CCA42

square

#42B0CA #A042CA #CA5C42 #6CCA42

split-complementary

#42B0CA #CA426C #CAA042

monochromatic

#206272 #2D8BA2 #42B0CA #72C4D7 #A2D8E5

Accessibility & contrast

On white

2.53

#42B0CA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.29

#42B0CA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B0CA

8.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B0CA	#FFFFFF	#000000	##000000
##42B0CA	1.00	2.53	8.29	8.29
#FFFFFF	2.53	1.00	21.00	21.00
#000000	8.29	21.00	1.00	1.00
##000000	8.29	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9EABCB

Deuteranopia (green-blind)

#8B9DCA

Tritanopia (blue-blind)

#00B9B8

Achromatopsia (no color)

#A3A3A3

Design tokens & code

CSS

--color: #42b0ca;
/* rgb */ color: rgb(66, 176, 202);
/* oklch */ color: oklch(70.5% 0.105 216.5);

Tailwind

colors: {
  custom: {
    50: '#87c7da',
    500: '#42b0ca',
    950: '#000000',
  },
}

SCSS

$custom: #42b0ca;
$custom-light: #87c7da;
$custom-dark: #000000;

JSON

{
  "hex": "#42b0ca",
  "rgb": {
    "r": 66,
    "g": 176,
    "b": 202
  },
  "hsl": {
    "h": 191.471,
    "s": 56.198,
    "l": 52.549
  },
  "oklch": {
    "l": 0.70538,
    "c": 0.10462,
    "h": 216.5
  },
  "luminance": 0.36473
}

Semantic roles & 50–950 ramp

primary

#42B0CA

secondary

#D1A296

accent

#6548DF

background

#F8FCFD

surface

#F0F8FA

border

#CBD1D3

text

#0D1314

muted

#7D8283

Preview Lab

Preview with #42B0CA

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

Preview Lab → · Contrast checker → · Palette generator →