#42B5CD#42B5CD

#42B5CD is a light, moderate cyan. Relative luminance 0.386; OKLCH L 71.9% C 0.107 H 214.3°. Best body text is #000000 at 8.72:1 contrast (WCAG AA passes).

Color values

HEX	#42B5CD
RGB	rgb(66, 181, 205)
HSL	hsl(190, 58%, 53%)
HSV	hsv(190, 68%, 80%)
CMYK	cmyk(67.8%, 11.7%, 0%, 19.6%)
CIE-LAB	lab(68.47, -24.47, -21.57)
CIE-LCH	lch(68.47, 32.62, 221.41°)
OKLab	oklab(71.85% -0.088 -0.06)
OKLCH	oklch(71.85% 0.107 214.3)
XYZ	xyz(29.7855, 38.6104, 63.6286)
Luminance	0.3861 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B5CD #CD5A42

analogous

#42CDA0 #42B5CD #426FCD

triadic

#42B5CD #CD42B5 #B5CD42

tetradic

#42B5CD #A042CD #CD5A42 #6FCD42

square

#42B5CD #A042CD #CD5A42 #6FCD42

split-complementary

#42B5CD #CD426F #CDA042

monochromatic

#1F6776 #2C91A6 #42B5CD #72C8DA #A3DBE7

Accessibility & contrast

On white

2.41

#42B5CD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.72

#42B5CD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B5CD

8.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B5CD	#FFFFFF	#000000	##000000
##42B5CD	1.00	2.41	8.72	8.72
#FFFFFF	2.41	1.00	21.00	21.00
#000000	8.72	21.00	1.00	1.00
##000000	8.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A4AFCE

Deuteranopia (green-blind)

#90A1CD

Tritanopia (blue-blind)

#00BEBC

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #42b5cd;
/* rgb */ color: rgb(66, 181, 205);
/* oklch */ color: oklch(71.9% 0.107 214.3);

Tailwind

colors: {
  custom: {
    50: '#87cbdc',
    500: '#42b5cd',
    950: '#000000',
  },
}

SCSS

$custom: #42b5cd;
$custom-light: #87cbdc;
$custom-dark: #000000;

JSON

{
  "hex": "#42b5cd",
  "rgb": {
    "r": 66,
    "g": 181,
    "b": 205
  },
  "hsl": {
    "h": 190.36,
    "s": 58.159,
    "l": 53.137
  },
  "oklch": {
    "l": 0.71852,
    "c": 0.10652,
    "h": 214.3
  },
  "luminance": 0.38614
}

Semantic roles & 50–950 ramp

primary

#42B5CD

secondary

#D3A297

accent

#6146E1

background

#F9FCFD

surface

#F1F8FB

border

#CBD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B5CD

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

Preview Lab → · Contrast checker → · Palette generator →