#42B9D3#42B9D3

#42B9D3 is a light, moderate cyan. Relative luminance 0.406; OKLCH L 73.0% C 0.110 H 215.2°. Best body text is #000000 at 9.11:1 contrast (WCAG AA passes).

Color values

HEX	#42B9D3
RGB	rgb(66, 185, 211)
HSL	hsl(191, 62%, 54%)
HSV	hsv(191, 69%, 83%)
CMYK	cmyk(68.7%, 12.3%, 0%, 17.3%)
CIE-LAB	lab(69.86, -24.64, -22.74)
CIE-LCH	lch(69.86, 33.53, 222.70°)
OKLab	oklab(73.04% -0.0896 -0.0633)
OKLCH	oklch(73.04% 0.11 215.2)
XYZ	xyz(31.3487, 40.5558, 67.7913)
Luminance	0.4056 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B9D3 #D35C42

analogous

#42D3A5 #42B9D3 #4270D3

triadic

#42B9D3 #D342B9 #B9D342

tetradic

#42B9D3 #A542D3 #D35C42 #70D342

square

#42B9D3 #A542D3 #D35C42 #70D342

split-complementary

#42B9D3 #D34270 #D3A542

monochromatic

#1D6C7D #2997AF #42B9D3 #74CBDF #A5DEEA

Accessibility & contrast

On white

2.30

#42B9D3 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.11

#42B9D3 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B9D3

9.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B9D3	#FFFFFF	#000000	##000000
##42B9D3	1.00	2.30	9.11	9.11
#FFFFFF	2.30	1.00	21.00	21.00
#000000	9.11	21.00	1.00	1.00
##000000	9.11	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A7B3D4

Deuteranopia (green-blind)

#92A4D3

Tritanopia (blue-blind)

#00C3C1

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #42b9d3;
/* rgb */ color: rgb(66, 185, 211);
/* oklch */ color: oklch(73.0% 0.110 215.2);

Tailwind

colors: {
  custom: {
    50: '#88cee0',
    500: '#42b9d3',
    950: '#000000',
  },
}

SCSS

$custom: #42b9d3;
$custom-light: #88cee0;
$custom-dark: #000000;

JSON

{
  "hex": "#42b9d3",
  "rgb": {
    "r": 66,
    "g": 185,
    "b": 211
  },
  "hsl": {
    "h": 190.759,
    "s": 62.232,
    "l": 54.314
  },
  "oklch": {
    "l": 0.73044,
    "c": 0.10975,
    "h": 215.2
  },
  "luminance": 0.40559
}

Semantic roles & 50–950 ramp

primary

#42B9D3

secondary

#D7A59A

accent

#6042E5

background

#F9FCFD

surface

#F1F9FB

border

#CBD2D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B9D3

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

Preview Lab → · Contrast checker → · Palette generator →