#42C1EA#42C1EA

#42C1EA is a light, vivid cyan. Relative luminance 0.452; OKLCH L 75.9% C 0.123 H 223.8°. Best body text is #000000 at 10.05:1 contrast (WCAG AA passes).

Color values

HEX	#42C1EA
RGB	rgb(66, 193, 234)
HSL	hsl(195, 80%, 59%)
HSV	hsv(195, 72%, 92%)
CMYK	cmyk(71.8%, 17.5%, 0%, 8.2%)
CIE-LAB	lab(73.05, -21.51, -30.37)
CIE-LCH	lch(73.05, 37.22, 234.69°)
OKLab	oklab(75.88% -0.0887 -0.085)
OKLCH	oklch(75.88% 0.123 223.8)
XYZ	xyz(36.1619, 45.2345, 84.6512)
Luminance	0.4524 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42C1EA #EA6B42

analogous

#42EABF #42C1EA #426DEA

triadic

#42C1EA #EA42C1 #C1EA42

tetradic

#42C1EA #BF42EA #EA6B42 #6DEA42

square

#42C1EA #BF42EA #EA6B42 #6DEA42

split-complementary

#42C1EA #EA426D #EABF42

monochromatic

#127DA0 #18A8D7 #42C1EA #79D3F0 #B0E5F6

Accessibility & contrast

On white

2.09

#42C1EA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.05

#42C1EA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42C1EA

10.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42C1EA	#FFFFFF	#000000	##000000
##42C1EA	1.00	2.09	10.05	10.05
#FFFFFF	2.09	1.00	21.00	21.00
#000000	10.05	21.00	1.00	1.00
##000000	10.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AABDEC

Deuteranopia (green-blind)

#93ACEA

Tritanopia (blue-blind)

#00CDCE

Achromatopsia (no color)

#B3B3B3

Design tokens & code

CSS

--color: #42c1ea;
/* rgb */ color: rgb(66, 193, 234);
/* oklch */ color: oklch(75.9% 0.123 223.8);

Tailwind

colors: {
  custom: {
    50: '#8cd3f0',
    500: '#42c1ea',
    950: '#000000',
  },
}

SCSS

$custom: #42c1ea;
$custom-light: #8cd3f0;
$custom-dark: #000000;

JSON

{
  "hex": "#42c1ea",
  "rgb": {
    "r": 66,
    "g": 193,
    "b": 234
  },
  "hsl": {
    "h": 194.643,
    "s": 80,
    "l": 58.824
  },
  "oklch": {
    "l": 0.75878,
    "c": 0.12287,
    "h": 223.8
  },
  "luminance": 0.45239
}

Semantic roles & 50–950 ramp

primary

#42C1EA

secondary

#E5B3A3

accent

#6131F6

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #42C1EA

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

Preview Lab → · Contrast checker → · Palette generator →