#42B3CF#42B3CF

#42B3CF is a light, moderate cyan. Relative luminance 0.379; OKLCH L 71.5% C 0.107 H 217.5°. Best body text is #000000 at 8.58:1 contrast (WCAG AA passes).

Color values

HEX	#42B3CF
RGB	rgb(66, 179, 207)
HSL	hsl(192, 59%, 54%)
HSV	hsv(192, 68%, 81%)
CMYK	cmyk(68.1%, 13.5%, 0%, 18.8%)
CIE-LAB	lab(67.95, -22.83, -23.47)
CIE-LCH	lch(67.95, 32.74, 225.79°)
OKLab	oklab(71.46% -0.0852 -0.0654)
OKLCH	oklch(71.46% 0.107 217.5)
XYZ	xyz(29.6247, 37.9001, 64.7735)
Luminance	0.3790 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B3CF #CF5E42

analogous

#42CFA4 #42B3CF #426CCF

triadic

#42B3CF #CF42B3 #B3CF42

tetradic

#42B3CF #A442CF #CF5E42 #6CCF42

square

#42B3CF #A442CF #CF5E42 #6CCF42

split-complementary

#42B3CF #CF426C #CFA442

monochromatic

#1F6678 #2B90A9 #42B3CF #73C7DB #A4DAE8

Accessibility & contrast

On white

2.45

#42B3CF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.58

#42B3CF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B3CF

8.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B3CF	#FFFFFF	#000000	##000000
##42B3CF	1.00	2.45	8.58	8.58
#FFFFFF	2.45	1.00	21.00	21.00
#000000	8.58	21.00	1.00	1.00
##000000	8.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A1AED1

Deuteranopia (green-blind)

#8D9FCF

Tritanopia (blue-blind)

#00BDBC

Achromatopsia (no color)

#A6A6A6

Design tokens & code

CSS

--color: #42b3cf;
/* rgb */ color: rgb(66, 179, 207);
/* oklch */ color: oklch(71.5% 0.107 217.5);

Tailwind

colors: {
  custom: {
    50: '#87cadd',
    500: '#42b3cf',
    950: '#000000',
  },
}

SCSS

$custom: #42b3cf;
$custom-light: #87cadd;
$custom-dark: #000000;

JSON

{
  "hex": "#42b3cf",
  "rgb": {
    "r": 66,
    "g": 179,
    "b": 207
  },
  "hsl": {
    "h": 191.915,
    "s": 59.494,
    "l": 53.529
  },
  "oklch": {
    "l": 0.71457,
    "c": 0.10739,
    "h": 217.5
  },
  "luminance": 0.37903
}

Semantic roles & 50–950 ramp

primary

#42B3CF

secondary

#D5A498

accent

#6445E3

background

#F9FCFD

surface

#F1F8FB

border

#CBD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B3CF

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

Preview Lab → · Contrast checker → · Palette generator →