#42B0CD#42B0CD

#42B0CD is a light, moderate cyan. Relative luminance 0.366; OKLCH L 70.7% C 0.106 H 218.7°. Best body text is #000000 at 8.32:1 contrast (WCAG AA passes).

Color values

HEX	#42B0CD
RGB	rgb(66, 176, 205)
HSL	hsl(193, 58%, 53%)
HSV	hsv(193, 68%, 80%)
CMYK	cmyk(67.8%, 14.1%, 0%, 19.6%)
CIE-LAB	lab(66.99, -21.92, -23.84)
CIE-LCH	lch(66.99, 32.38, 227.40°)
OKLab	oklab(70.66% -0.0829 -0.0664)
OKLCH	oklch(70.66% 0.106 218.7)
XYZ	xyz(28.7870, 36.6135, 63.2957)
Luminance	0.3662 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B0CD #CD5F42

analogous

#42CDA4 #42B0CD #426ACD

triadic

#42B0CD #CD42B0 #B0CD42

tetradic

#42B0CD #A442CD #CD5F42 #6ACD42

square

#42B0CD #A442CD #CD5F42 #6ACD42

split-complementary

#42B0CD #CD426A #CDA442

monochromatic

#1F6376 #2C8CA6 #42B0CD #72C4DA #A3D8E7

Accessibility & contrast

On white

2.52

#42B0CD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.32

#42B0CD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B0CD

8.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B0CD	#FFFFFF	#000000	##000000
##42B0CD	1.00	2.52	8.32	8.32
#FFFFFF	2.52	1.00	21.00	21.00
#000000	8.32	21.00	1.00	1.00
##000000	8.32	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9EABCF

Deuteranopia (green-blind)

#8A9DCD

Tritanopia (blue-blind)

#00BAB9

Achromatopsia (no color)

#A3A3A3

Design tokens & code

CSS

--color: #42b0cd;
/* rgb */ color: rgb(66, 176, 205);
/* oklch */ color: oklch(70.7% 0.106 218.7);

Tailwind

colors: {
  custom: {
    50: '#87c7dc',
    500: '#42b0cd',
    950: '#000000',
  },
}

SCSS

$custom: #42b0cd;
$custom-light: #87c7dc;
$custom-dark: #000000;

JSON

{
  "hex": "#42b0cd",
  "rgb": {
    "r": 66,
    "g": 176,
    "b": 205
  },
  "hsl": {
    "h": 192.518,
    "s": 58.159,
    "l": 53.137
  },
  "oklch": {
    "l": 0.70661,
    "c": 0.10627,
    "h": 218.7
  },
  "luminance": 0.36617
}

Semantic roles & 50–950 ramp

primary

#42B0CD

secondary

#D3A497

accent

#6746E1

background

#F8FCFD

surface

#F0F8FB

border

#CBD1D4

text

#0D1315

muted

#7D8283

Preview Lab

Preview with #42B0CD

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

Preview Lab → · Contrast checker → · Palette generator →