#42B3CD#42B3CD

#42B3CD is a light, moderate cyan. Relative luminance 0.378; OKLCH L 71.4% C 0.106 H 216.1°. Best body text is #000000 at 8.56:1 contrast (WCAG AA passes).

Color values

HEX	#42B3CD
RGB	rgb(66, 179, 205)
HSL	hsl(191, 58%, 53%)
HSV	hsv(191, 68%, 80%)
CMYK	cmyk(67.8%, 12.7%, 0%, 19.6%)
CIE-LAB	lab(67.88, -23.45, -22.48)
CIE-LCH	lch(67.88, 32.49, 223.79°)
OKLab	oklab(71.38% -0.086 -0.0626)
OKLCH	oklch(71.38% 0.106 216.1)
XYZ	xyz(29.3817, 37.8029, 63.4940)
Luminance	0.3781 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B3CD #CD5C42

analogous

#42CDA1 #42B3CD #426DCD

triadic

#42B3CD #CD42B3 #B3CD42

tetradic

#42B3CD #A142CD #CD5C42 #6DCD42

square

#42B3CD #A142CD #CD5C42 #6DCD42

split-complementary

#42B3CD #CD426D #CDA142

monochromatic

#1F6576 #2C8FA6 #42B3CD #72C6DA #A3DAE7

Accessibility & contrast

On white

2.45

#42B3CD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.56

#42B3CD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B3CD

8.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B3CD	#FFFFFF	#000000	##000000
##42B3CD	1.00	2.45	8.56	8.56
#FFFFFF	2.45	1.00	21.00	21.00
#000000	8.56	21.00	1.00	1.00
##000000	8.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A1AECE

Deuteranopia (green-blind)

#8E9FCD

Tritanopia (blue-blind)

#00BCBB

Achromatopsia (no color)

#A5A5A5

Design tokens & code

CSS

--color: #42b3cd;
/* rgb */ color: rgb(66, 179, 205);
/* oklch */ color: oklch(71.4% 0.106 216.1);

Tailwind

colors: {
  custom: {
    50: '#87cadc',
    500: '#42b3cd',
    950: '#000000',
  },
}

SCSS

$custom: #42b3cd;
$custom-light: #87cadc;
$custom-dark: #000000;

JSON

{
  "hex": "#42b3cd",
  "rgb": {
    "r": 66,
    "g": 179,
    "b": 205
  },
  "hsl": {
    "h": 191.223,
    "s": 58.159,
    "l": 53.137
  },
  "oklch": {
    "l": 0.71375,
    "c": 0.10634,
    "h": 216.1
  },
  "luminance": 0.37806
}

Semantic roles & 50–950 ramp

primary

#42B3CD

secondary

#D3A397

accent

#6346E1

background

#F9FCFD

surface

#F1F8FB

border

#CBD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B3CD

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

Preview Lab → · Contrast checker → · Palette generator →