#42C4E0#42C4E0

#42C4E0 is a light, moderate cyan. Relative luminance 0.460; OKLCH L 76.2% C 0.117 H 215.2°. Best body text is #000000 at 10.20:1 contrast (WCAG AA passes).

Color values

HEX	#42C4E0
RGB	rgb(66, 196, 224)
HSL	hsl(191, 72%, 57%)
HSV	hsv(191, 71%, 88%)
CMYK	cmyk(70.5%, 12.5%, 0%, 12.2%)
CIE-LAB	lab(73.56, -26.15, -24.18)
CIE-LCH	lch(73.56, 35.62, 222.76°)
OKLab	oklab(76.17% -0.0954 -0.0674)
OKLCH	oklch(76.17% 0.117 215.2)
XYZ	xyz(35.4356, 46.0158, 77.5209)
Luminance	0.4602 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42C4E0 #E05E42

analogous

#42E0AD #42C4E0 #4275E0

triadic

#42C4E0 #E042C4 #C4E042

tetradic

#42C4E0 #AD42E0 #E05E42 #75E042

square

#42C4E0 #AD42E0 #E05E42 #75E042

split-complementary

#42C4E0 #E04275 #E0AD42

monochromatic

#187B90 #20A7C5 #42C4E0 #77D4E9 #ABE5F1

Accessibility & contrast

On white

2.06

#42C4E0 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.20

#42C4E0 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42C4E0

10.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42C4E0	#FFFFFF	#000000	##000000
##42C4E0	1.00	2.06	10.20	10.20
#FFFFFF	2.06	1.00	21.00	21.00
#000000	10.20	21.00	1.00	1.00
##000000	10.20	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B0BEE2

Deuteranopia (green-blind)

#9AAEE0

Tritanopia (blue-blind)

#00CECD

Achromatopsia (no color)

#B5B5B5

Design tokens & code

CSS

--color: #42c4e0;
/* rgb */ color: rgb(66, 196, 224);
/* oklch */ color: oklch(76.2% 0.117 215.2);

Tailwind

colors: {
  custom: {
    50: '#8bd6e9',
    500: '#42c4e0',
    950: '#000000',
  },
}

SCSS

$custom: #42c4e0;
$custom-light: #8bd6e9;
$custom-dark: #000000;

JSON

{
  "hex": "#42c4e0",
  "rgb": {
    "r": 66,
    "g": 196,
    "b": 224
  },
  "hsl": {
    "h": 190.633,
    "s": 71.818,
    "l": 56.863
  },
  "oklch": {
    "l": 0.76166,
    "c": 0.1168,
    "h": 215.2
  },
  "luminance": 0.4602
}

Semantic roles & 50–950 ramp

primary

#42C4E0

secondary

#DFAA9F

accent

#5939EF

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0D1416

muted

#7E8384

Preview Lab

Preview with #42C4E0

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

Preview Lab → · Contrast checker → · Palette generator →