#42C8F4#42C8F4

#42C8F4 is a light, vivid cyan. Relative luminance 0.490; OKLCH L 77.9% C 0.128 H 224.4°. Best body text is #000000 at 10.80:1 contrast (WCAG AA passes).

Color values

HEX	#42C8F4
RGB	rgb(66, 200, 244)
HSL	hsl(195, 89%, 61%)
HSV	hsv(195, 73%, 96%)
CMYK	cmyk(73%, 18%, 0%, 4.3%)
CIE-LAB	lab(75.45, -21.92, -32.06)
CIE-LCH	lch(75.45, 38.84, 235.65°)
OKLab	oklab(77.93% -0.0917 -0.0898)
OKLCH	oklch(77.93% 0.128 224.4)
XYZ	xyz(39.2235, 48.9938, 92.9600)
Luminance	0.4900 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42C8F4 #F46E42

analogous

#42F4C7 #42C8F4 #426FF4

triadic

#42C8F4 #F442C8 #C8F442

tetradic

#42C8F4 #C742F4 #F46E42 #6FF442

square

#42C8F4 #C742F4 #F46E42 #6FF442

split-complementary

#42C8F4 #F4426F #F4C742

monochromatic

#0A88B1 #0EB4EB #42C8F4 #7CD9F7 #B6EAFB

Accessibility & contrast

On white

1.94

#42C8F4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.80

#42C8F4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42C8F4

10.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42C8F4	#FFFFFF	#000000	##000000
##42C8F4	1.00	1.94	10.80	10.80
#FFFFFF	1.94	1.00	21.00	21.00
#000000	10.80	21.00	1.00	1.00
##000000	10.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AFC4F6

Deuteranopia (green-blind)

#97B2F4

Tritanopia (blue-blind)

#00D5D6

Achromatopsia (no color)

#BABABA

Design tokens & code

CSS

--color: #42c8f4;
/* rgb */ color: rgb(66, 200, 244);
/* oklch */ color: oklch(77.9% 0.128 224.4);

Tailwind

colors: {
  custom: {
    50: '#8ed8f8',
    500: '#42c8f4',
    950: '#000000',
  },
}

SCSS

$custom: #42c8f4;
$custom-light: #8ed8f8;
$custom-dark: #000000;

JSON

{
  "hex": "#42c8f4",
  "rgb": {
    "r": 66,
    "g": 200,
    "b": 244
  },
  "hsl": {
    "h": 194.831,
    "s": 89,
    "l": 60.784
  },
  "oklch": {
    "l": 0.77927,
    "c": 0.12837,
    "h": 224.4
  },
  "luminance": 0.48998
}

Semantic roles & 50–950 ramp

primary

#42C8F4

secondary

#EBB8A7

accent

#3900E6

background

#F9FDFF

surface

#F2FAFE

border

#CCD3D6

text

#0E1417

muted

#7E8385

Preview Lab

Preview with #42C8F4

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

Preview Lab → · Contrast checker → · Palette generator →