#42B9D5#42B9D5

#42B9D5 is a light, moderate cyan. Relative luminance 0.407; OKLCH L 73.1% C 0.111 H 216.7°. Best body text is #000000 at 9.13:1 contrast (WCAG AA passes).

Color values

HEX	#42B9D5
RGB	rgb(66, 185, 213)
HSL	hsl(191, 64%, 55%)
HSV	hsv(191, 69%, 84%)
CMYK	cmyk(69%, 13.1%, 0%, 16.5%)
CIE-LAB	lab(69.93, -24.02, -23.72)
CIE-LCH	lch(69.93, 33.76, 224.64°)
OKLab	oklab(73.13% -0.0888 -0.0661)
OKLCH	oklch(73.13% 0.111 216.7)
XYZ	xyz(31.6010, 40.6567, 69.1200)
Luminance	0.4066 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B9D5 #D55E42

analogous

#42D5A8 #42B9D5 #426FD5

triadic

#42B9D5 #D542B9 #B9D542

tetradic

#42B9D5 #A842D5 #D55E42 #6FD542

square

#42B9D5 #A842D5 #D55E42 #6FD542

split-complementary

#42B9D5 #D5426F #D5A842

monochromatic

#1C6D80 #2898B2 #42B9D5 #74CCE0 #A6DEEB

Accessibility & contrast

On white

2.30

#42B9D5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.13

#42B9D5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B9D5

9.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B9D5	#FFFFFF	#000000	##000000
##42B9D5	1.00	2.30	9.13	9.13
#FFFFFF	2.30	1.00	21.00	21.00
#000000	9.13	21.00	1.00	1.00
##000000	9.13	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A6B4D7

Deuteranopia (green-blind)

#92A4D5

Tritanopia (blue-blind)

#00C3C2

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #42b9d5;
/* rgb */ color: rgb(66, 185, 213);
/* oklch */ color: oklch(73.1% 0.111 216.7);

Tailwind

colors: {
  custom: {
    50: '#89cee2',
    500: '#42b9d5',
    950: '#000000',
  },
}

SCSS

$custom: #42b9d5;
$custom-light: #89cee2;
$custom-dark: #000000;

JSON

{
  "hex": "#42b9d5",
  "rgb": {
    "r": 66,
    "g": 185,
    "b": 213
  },
  "hsl": {
    "h": 191.429,
    "s": 63.636,
    "l": 54.706
  },
  "oklch": {
    "l": 0.73125,
    "c": 0.11075,
    "h": 216.7
  },
  "luminance": 0.4066
}

Semantic roles & 50–950 ramp

primary

#42B9D5

secondary

#D8A69A

accent

#6141E7

background

#F9FCFD

surface

#F1F9FB

border

#CBD2D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B9D5

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

Preview Lab → · Contrast checker → · Palette generator →