#42D4F3#42D4F3

#42D4F3 is a light, vivid cyan. Relative luminance 0.547; OKLCH L 80.7% C 0.127 H 215.3°. Best body text is #000000 at 11.94:1 contrast (WCAG AA passes).

Color values

HEX	#42D4F3
RGB	rgb(66, 212, 243)
HSL	hsl(191, 88%, 61%)
HSV	hsv(191, 73%, 95%)
CMYK	cmyk(72.8%, 12.8%, 0%, 4.7%)
CIE-LAB	lab(78.87, -28.22, -26.27)
CIE-LCH	lch(78.87, 38.56, 222.95°)
OKLab	oklab(80.67% -0.1034 -0.0733)
OKLCH	oklch(80.67% 0.127 215.3)
XYZ	xyz(41.9610, 54.7113, 93.1255)
Luminance	0.5472 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42D4F3 #F36142

analogous

#42F3B9 #42D4F3 #427CF3

triadic

#42D4F3 #F342D4 #D4F342

tetradic

#42D4F3 #B942F3 #F36142 #7CF342

square

#42D4F3 #B942F3 #F36142 #7CF342

split-complementary

#42D4F3 #F3427C #F3B942

monochromatic

#0B93AF #0FC3E9 #42D4F3 #7CE1F7 #B5EEFA

Accessibility & contrast

On white

1.76

#42D4F3 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.94

#42D4F3 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42D4F3

11.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42D4F3	#FFFFFF	#000000	##000000
##42D4F3	1.00	1.76	11.94	11.94
#FFFFFF	1.76	1.00	21.00	21.00
#000000	11.94	21.00	1.00	1.00
##000000	11.94	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BECDF5

Deuteranopia (green-blind)

#A6BCF3

Tritanopia (blue-blind)

#00DFDE

Achromatopsia (no color)

#C3C3C3

Design tokens & code

CSS

--color: #42d4f3;
/* rgb */ color: rgb(66, 212, 243);
/* oklch */ color: oklch(80.7% 0.127 215.3);

Tailwind

colors: {
  custom: {
    50: '#8ee1f7',
    500: '#42d4f3',
    950: '#000000',
  },
}

SCSS

$custom: #42d4f3;
$custom-light: #8ee1f7;
$custom-dark: #000000;

JSON

{
  "hex": "#42d4f3",
  "rgb": {
    "r": 66,
    "g": 212,
    "b": 243
  },
  "hsl": {
    "h": 190.508,
    "s": 88.06,
    "l": 60.588
  },
  "oklch": {
    "l": 0.80667,
    "c": 0.12673,
    "h": 215.3
  },
  "luminance": 0.54716
}

Semantic roles & 50–950 ramp

primary

#42D4F3

secondary

#B0412A

accent

#2901E5

background

#FCFEFF

surface

#F5FCFE

border

#CFD5D6

text

#0E1517

muted

#7F8485

Preview Lab

Preview with #42D4F3

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

Preview Lab → · Contrast checker → · Palette generator →