#42B8D4#42B8D4

#42B8D4 is a light, moderate cyan. Relative luminance 0.402; OKLCH L 72.8% C 0.110 H 216.8°. Best body text is #000000 at 9.04:1 contrast (WCAG AA passes).

Color values

HEX	#42B8D4
RGB	rgb(66, 184, 212)
HSL	hsl(192, 63%, 55%)
HSV	hsv(192, 69%, 83%)
CMYK	cmyk(68.9%, 13.2%, 0%, 16.9%)
CIE-LAB	lab(69.60, -23.83, -23.68)
CIE-LCH	lch(69.60, 33.59, 224.82°)
OKLab	oklab(72.85% -0.0882 -0.066)
OKLCH	oklch(72.85% 0.11 216.8)
XYZ	xyz(31.2660, 40.1892, 68.3841)
Luminance	0.4019 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B8D4 #D45E42

analogous

#42D4A7 #42B8D4 #426FD4

triadic

#42B8D4 #D442B8 #B8D442

tetradic

#42B8D4 #A742D4 #D45E42 #6FD442

square

#42B8D4 #A742D4 #D45E42 #6FD442

split-complementary

#42B8D4 #D4426F #D4A742

monochromatic

#1D6C7F #2896B1 #42B8D4 #74CBDF #A6DDEB

Accessibility & contrast

On white

2.32

#42B8D4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.04

#42B8D4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B8D4

9.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B8D4	#FFFFFF	#000000	##000000
##42B8D4	1.00	2.32	9.04	9.04
#FFFFFF	2.32	1.00	21.00	21.00
#000000	9.04	21.00	1.00	1.00
##000000	9.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A5B3D6

Deuteranopia (green-blind)

#91A4D4

Tritanopia (blue-blind)

#00C2C1

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #42b8d4;
/* rgb */ color: rgb(66, 184, 212);
/* oklch */ color: oklch(72.8% 0.110 216.8);

Tailwind

colors: {
  custom: {
    50: '#88cde1',
    500: '#42b8d4',
    950: '#000000',
  },
}

SCSS

$custom: #42b8d4;
$custom-light: #88cde1;
$custom-dark: #000000;

JSON

{
  "hex": "#42b8d4",
  "rgb": {
    "r": 66,
    "g": 184,
    "b": 212
  },
  "hsl": {
    "h": 191.507,
    "s": 62.931,
    "l": 54.51
  },
  "oklch": {
    "l": 0.72847,
    "c": 0.11019,
    "h": 216.8
  },
  "luminance": 0.40193
}

Semantic roles & 50–950 ramp

primary

#42B8D4

secondary

#D8A69A

accent

#6142E6

background

#F9FCFD

surface

#F1F9FB

border

#CBD2D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B8D4

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

Preview Lab → · Contrast checker → · Palette generator →