#42B4CE#42B4CE

#42B4CE is a light, moderate cyan. Relative luminance 0.383; OKLCH L 71.7% C 0.107 H 215.9°. Best body text is #000000 at 8.65:1 contrast (WCAG AA passes).

Color values

HEX	#42B4CE
RGB	rgb(66, 180, 206)
HSL	hsl(191, 59%, 53%)
HSV	hsv(191, 68%, 81%)
CMYK	cmyk(68%, 12.6%, 0%, 19.2%)
CIE-LAB	lab(68.21, -23.65, -22.52)
CIE-LCH	lch(68.21, 32.66, 223.60°)
OKLab	oklab(71.65% -0.0866 -0.0627)
OKLCH	oklch(71.65% 0.107 215.9)
XYZ	xyz(29.7040, 38.2537, 64.1988)
Luminance	0.3826 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B4CE #CE5C42

analogous

#42CEA2 #42B4CE #426ECE

triadic

#42B4CE #CE42B4 #B4CE42

tetradic

#42B4CE #A242CE #CE5C42 #6ECE42

square

#42B4CE #A242CE #CE5C42 #6ECE42

split-complementary

#42B4CE #CE426E #CEA242

monochromatic

#1F6677 #2B90A7 #42B4CE #73C7DB #A3DBE7

Accessibility & contrast

On white

2.43

#42B4CE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.65

#42B4CE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B4CE

8.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B4CE	#FFFFFF	#000000	##000000
##42B4CE	1.00	2.43	8.65	8.65
#FFFFFF	2.43	1.00	21.00	21.00
#000000	8.65	21.00	1.00	1.00
##000000	8.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A2AFCF

Deuteranopia (green-blind)

#8EA0CE

Tritanopia (blue-blind)

#00BDBC

Achromatopsia (no color)

#A6A6A6

Design tokens & code

CSS

--color: #42b4ce;
/* rgb */ color: rgb(66, 180, 206);
/* oklch */ color: oklch(71.7% 0.107 215.9);

Tailwind

colors: {
  custom: {
    50: '#87cadd',
    500: '#42b4ce',
    950: '#000000',
  },
}

SCSS

$custom: #42b4ce;
$custom-light: #87cadd;
$custom-dark: #000000;

JSON

{
  "hex": "#42b4ce",
  "rgb": {
    "r": 66,
    "g": 180,
    "b": 206
  },
  "hsl": {
    "h": 191.143,
    "s": 58.824,
    "l": 53.333
  },
  "oklch": {
    "l": 0.71654,
    "c": 0.10691,
    "h": 215.9
  },
  "luminance": 0.38257
}

Semantic roles & 50–950 ramp

primary

#42B4CE

secondary

#D4A398

accent

#6346E2

background

#F9FCFD

surface

#F1F8FB

border

#CBD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B4CE

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

Preview Lab → · Contrast checker → · Palette generator →