#42ACC4#42ACC4

#42ACC4 is a light, moderate cyan. Relative luminance 0.346; OKLCH L 69.3% C 0.101 H 215.6°. Best body text is #000000 at 7.93:1 contrast (WCAG AA passes).

Color values

HEX	#42ACC4
RGB	rgb(66, 172, 196)
HSL	hsl(191, 52%, 51%)
HSV	hsv(191, 66%, 77%)
CMYK	cmyk(66.3%, 12.2%, 0%, 23.1%)
CIE-LAB	lab(65.47, -22.66, -21.17)
CIE-LCH	lch(65.47, 31.01, 223.06°)
OKLab	oklab(69.34% -0.0824 -0.0589)
OKLCH	oklch(69.34% 0.101 215.6)
XYZ	xyz(26.9590, 34.6459, 57.4804)
Luminance	0.3465 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42ACC4 #C45A42

analogous

#42C49B #42ACC4 #426BC4

triadic

#42ACC4 #C442AC #ACC442

tetradic

#42ACC4 #9B42C4 #C45A42 #6BC442

square

#42ACC4 #9B42C4 #C45A42 #6BC442

split-complementary

#42ACC4 #C4426B #C49B42

monochromatic

#215D6A #308699 #42ACC4 #71C0D3 #9FD5E1

Accessibility & contrast

On white

2.65

#42ACC4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.93

#42ACC4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42ACC4

7.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42ACC4	#FFFFFF	#000000	##000000
##42ACC4	1.00	2.65	7.93	7.93
#FFFFFF	2.65	1.00	21.00	21.00
#000000	7.93	21.00	1.00	1.00
##000000	7.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9BA7C5

Deuteranopia (green-blind)

#8999C4

Tritanopia (blue-blind)

#00B5B3

Achromatopsia (no color)

#9F9F9F

Design tokens & code

CSS

--color: #42acc4;
/* rgb */ color: rgb(66, 172, 196);
/* oklch */ color: oklch(69.3% 0.101 215.6);

Tailwind

colors: {
  custom: {
    50: '#86c5d6',
    500: '#42acc4',
    950: '#000000',
  },
}

SCSS

$custom: #42acc4;
$custom-light: #86c5d6;
$custom-dark: #000000;

JSON

{
  "hex": "#42acc4",
  "rgb": {
    "r": 66,
    "g": 172,
    "b": 196
  },
  "hsl": {
    "h": 191.077,
    "s": 52.419,
    "l": 51.373
  },
  "oklch": {
    "l": 0.69338,
    "c": 0.10127,
    "h": 215.6
  },
  "luminance": 0.34649
}

Semantic roles & 50–950 ramp

primary

#42ACC4

secondary

#CE9F94

accent

#674CDC

background

#F8FCFD

surface

#F0F8FA

border

#CBD1D3

text

#0C1214

muted

#7D8183

Preview Lab

Preview with #42ACC4

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

Preview Lab → · Contrast checker → · Palette generator →