#42C8E7#42C8E7

#42C8E7 is a light, vivid cyan. Relative luminance 0.482; OKLCH L 77.4% C 0.120 H 216.7°. Best body text is #000000 at 10.65:1 contrast (WCAG AA passes).

Color values

HEX	#42C8E7
RGB	rgb(66, 200, 231)
HSL	hsl(191, 77%, 58%)
HSV	hsv(191, 71%, 91%)
CMYK	cmyk(71.4%, 13.4%, 0%, 9.4%)
CIE-LAB	lab(74.97, -25.99, -25.80)
CIE-LCH	lch(74.97, 36.62, 224.79°)
OKLab	oklab(77.39% -0.0966 -0.072)
OKLCH	oklch(77.39% 0.12 216.7)
XYZ	xyz(37.3188, 48.2320, 82.9287)
Luminance	0.4824 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42C8E7 #E76142

analogous

#42E7B4 #42C8E7 #4275E7

triadic

#42C8E7 #E742C8 #C8E742

tetradic

#42C8E7 #B442E7 #E76142 #75E742

square

#42C8E7 #B442E7 #E76142 #75E742

split-complementary

#42C8E7 #E74275 #E7B442

monochromatic

#14829B #1BAFD1 #42C8E7 #78D8EE #AFE8F5

Accessibility & contrast

On white

1.97

#42C8E7 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.65

#42C8E7 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42C8E7

10.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42C8E7	#FFFFFF	#000000	##000000
##42C8E7	1.00	1.97	10.65	10.65
#FFFFFF	1.97	1.00	21.00	21.00
#000000	10.65	21.00	1.00	1.00
##000000	10.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B3C2E9

Deuteranopia (green-blind)

#9DB1E7

Tritanopia (blue-blind)

#00D3D2

Achromatopsia (no color)

#B9B9B9

Design tokens & code

CSS

--color: #42c8e7;
/* rgb */ color: rgb(66, 200, 231);
/* oklch */ color: oklch(77.4% 0.120 216.7);

Tailwind

colors: {
  custom: {
    50: '#8cd9ee',
    500: '#42c8e7',
    950: '#000000',
  },
}

SCSS

$custom: #42c8e7;
$custom-light: #8cd9ee;
$custom-dark: #000000;

JSON

{
  "hex": "#42c8e7",
  "rgb": {
    "r": 66,
    "g": 200,
    "b": 231
  },
  "hsl": {
    "h": 191.273,
    "s": 77.465,
    "l": 58.235
  },
  "oklch": {
    "l": 0.77387,
    "c": 0.12043,
    "h": 216.7
  },
  "luminance": 0.48236
}

Semantic roles & 50–950 ramp

primary

#42C8E7

secondary

#E3AEA2

accent

#5834F4

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #42C8E7

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

Preview Lab → · Contrast checker → · Palette generator →