#42B1CD#42B1CD

#42B1CD is a light, moderate cyan. Relative luminance 0.370; OKLCH L 70.9% C 0.106 H 217.8°. Best body text is #000000 at 8.40:1 contrast (WCAG AA passes).

Color values

HEX	#42B1CD
RGB	rgb(66, 177, 205)
HSL	hsl(192, 58%, 53%)
HSV	hsv(192, 68%, 80%)
CMYK	cmyk(67.8%, 13.7%, 0%, 19.6%)
CIE-LAB	lab(67.28, -22.43, -23.38)
CIE-LCH	lch(67.28, 32.40, 226.19°)
OKLab	oklab(70.9% -0.0839 -0.0652)
OKLCH	oklch(70.9% 0.106 217.8)
XYZ	xyz(28.9838, 37.0071, 63.3613)
Luminance	0.3701 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B1CD #CD5E42

analogous

#42CDA3 #42B1CD #426BCD

triadic

#42B1CD #CD42B1 #B1CD42

tetradic

#42B1CD #A342CD #CD5E42 #6BCD42

square

#42B1CD #A342CD #CD5E42 #6BCD42

split-complementary

#42B1CD #CD426B #CDA342

monochromatic

#1F6476 #2C8DA6 #42B1CD #72C5DA #A3D9E7

Accessibility & contrast

On white

2.50

#42B1CD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.40

#42B1CD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B1CD

8.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B1CD	#FFFFFF	#000000	##000000
##42B1CD	1.00	2.50	8.40	8.40
#FFFFFF	2.50	1.00	21.00	21.00
#000000	8.40	21.00	1.00	1.00
##000000	8.40	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9FACCF

Deuteranopia (green-blind)

#8B9ECD

Tritanopia (blue-blind)

#00BBBA

Achromatopsia (no color)

#A4A4A4

Design tokens & code

CSS

--color: #42b1cd;
/* rgb */ color: rgb(66, 177, 205);
/* oklch */ color: oklch(70.9% 0.106 217.8);

Tailwind

colors: {
  custom: {
    50: '#87c8dc',
    500: '#42b1cd',
    950: '#000000',
  },
}

SCSS

$custom: #42b1cd;
$custom-light: #87c8dc;
$custom-dark: #000000;

JSON

{
  "hex": "#42b1cd",
  "rgb": {
    "r": 66,
    "g": 177,
    "b": 205
  },
  "hsl": {
    "h": 192.086,
    "s": 58.159,
    "l": 53.137
  },
  "oklch": {
    "l": 0.70899,
    "c": 0.10627,
    "h": 217.8
  },
  "luminance": 0.3701
}

Semantic roles & 50–950 ramp

primary

#42B1CD

secondary

#D3A497

accent

#6646E1

background

#F8FCFD

surface

#F0F8FB

border

#CBD1D4

text

#0D1315

muted

#7D8283

Preview Lab

Preview with #42B1CD

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

Preview Lab → · Contrast checker → · Palette generator →