#42B8D8#42B8D8

#42B8D8 is a light, moderate cyan. Relative luminance 0.404; OKLCH L 73.0% C 0.112 H 219.5°. Best body text is #000000 at 9.08:1 contrast (WCAG AA passes).

Color values

HEX	#42B8D8
RGB	rgb(66, 184, 216)
HSL	hsl(193, 66%, 55%)
HSV	hsv(193, 69%, 85%)
CMYK	cmyk(69.4%, 14.8%, 0%, 15.3%)
CIE-LAB	lab(69.75, -22.58, -25.65)
CIE-LCH	lch(69.75, 34.17, 228.64°)
OKLab	oklab(73.01% -0.0867 -0.0716)
OKLCH	oklch(73.01% 0.112 219.5)
XYZ	xyz(31.7768, 40.3935, 71.0744)
Luminance	0.4040 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B8D8 #D86242

analogous

#42D8AD #42B8D8 #426DD8

triadic

#42B8D8 #D842B8 #B8D842

tetradic

#42B8D8 #AD42D8 #D86242 #6DD842

square

#42B8D8 #AD42D8 #D86242 #6DD842

split-complementary

#42B8D8 #D8426D #D8AD42

monochromatic

#1B6E84 #2698B7 #42B8D8 #75CBE2 #A7DEED

Accessibility & contrast

On white

2.31

#42B8D8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.08

#42B8D8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B8D8

9.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B8D8	#FFFFFF	#000000	##000000
##42B8D8	1.00	2.31	9.08	9.08
#FFFFFF	2.31	1.00	21.00	21.00
#000000	9.08	21.00	1.00	1.00
##000000	9.08	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A4B3DA

Deuteranopia (green-blind)

#8FA4D8

Tritanopia (blue-blind)

#00C3C2

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #42b8d8;
/* rgb */ color: rgb(66, 184, 216);
/* oklch */ color: oklch(73.0% 0.112 219.5);

Tailwind

colors: {
  custom: {
    50: '#89cde4',
    500: '#42b8d8',
    950: '#000000',
  },
}

SCSS

$custom: #42b8d8;
$custom-light: #89cde4;
$custom-dark: #000000;

JSON

{
  "hex": "#42b8d8",
  "rgb": {
    "r": 66,
    "g": 184,
    "b": 216
  },
  "hsl": {
    "h": 192.8,
    "s": 65.789,
    "l": 55.294
  },
  "oklch": {
    "l": 0.73012,
    "c": 0.11243,
    "h": 219.5
  },
  "luminance": 0.40397
}

Semantic roles & 50–950 ramp

primary

#42B8D8

secondary

#DAA99C

accent

#633FE9

background

#F9FCFD

surface

#F1F9FB

border

#CBD2D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B8D8

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

Preview Lab → · Contrast checker → · Palette generator →