#42B4CD#42B4CD

#42B4CD is a light, moderate cyan. Relative luminance 0.382; OKLCH L 71.6% C 0.106 H 215.2°. Best body text is #000000 at 8.64:1 contrast (WCAG AA passes).

Color values

HEX	#42B4CD
RGB	rgb(66, 180, 205)
HSL	hsl(191, 58%, 53%)
HSV	hsv(191, 68%, 80%)
CMYK	cmyk(67.8%, 12.2%, 0%, 19.6%)
CIE-LAB	lab(68.17, -23.96, -22.03)
CIE-LCH	lch(68.17, 32.55, 222.59°)
OKLab	oklab(71.61% -0.087 -0.0613)
OKLCH	oklch(71.61% 0.106 215.2)
XYZ	xyz(29.5829, 38.2052, 63.5610)
Luminance	0.3821 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B4CD #CD5B42

analogous

#42CDA0 #42B4CD #426FCD

triadic

#42B4CD #CD42B4 #B4CD42

tetradic

#42B4CD #A042CD #CD5B42 #6FCD42

square

#42B4CD #A042CD #CD5B42 #6FCD42

split-complementary

#42B4CD #CD426F #CDA042

monochromatic

#1F6676 #2C90A6 #42B4CD #72C7DA #A3DAE7

Accessibility & contrast

On white

2.43

#42B4CD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.64

#42B4CD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B4CD

8.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B4CD	#FFFFFF	#000000	##000000
##42B4CD	1.00	2.43	8.64	8.64
#FFFFFF	2.43	1.00	21.00	21.00
#000000	8.64	21.00	1.00	1.00
##000000	8.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A2AECE

Deuteranopia (green-blind)

#8FA0CD

Tritanopia (blue-blind)

#00BDBC

Achromatopsia (no color)

#A6A6A6

Design tokens & code

CSS

--color: #42b4cd;
/* rgb */ color: rgb(66, 180, 205);
/* oklch */ color: oklch(71.6% 0.106 215.2);

Tailwind

colors: {
  custom: {
    50: '#87cadc',
    500: '#42b4cd',
    950: '#000000',
  },
}

SCSS

$custom: #42b4cd;
$custom-light: #87cadc;
$custom-dark: #000000;

JSON

{
  "hex": "#42b4cd",
  "rgb": {
    "r": 66,
    "g": 180,
    "b": 205
  },
  "hsl": {
    "h": 190.791,
    "s": 58.159,
    "l": 53.137
  },
  "oklch": {
    "l": 0.71613,
    "c": 0.10642,
    "h": 215.2
  },
  "luminance": 0.38209
}

Semantic roles & 50–950 ramp

primary

#42B4CD

secondary

#D3A297

accent

#6246E1

background

#F9FCFD

surface

#F1F8FB

border

#CBD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B4CD

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

Preview Lab → · Contrast checker → · Palette generator →