#42B9DF#42B9DF

#42B9DF is a light, moderate cyan. Relative luminance 0.412; OKLCH L 73.5% C 0.117 H 223.3°. Best body text is #000000 at 9.24:1 contrast (WCAG AA passes).

Color values

HEX	#42B9DF
RGB	rgb(66, 185, 223)
HSL	hsl(195, 71%, 57%)
HSV	hsv(195, 70%, 87%)
CMYK	cmyk(70.4%, 17%, 0%, 12.5%)
CIE-LAB	lab(70.30, -20.89, -28.62)
CIE-LCH	lch(70.30, 35.44, 233.88°)
OKLab	oklab(73.54% -0.085 -0.08)
OKLCH	oklch(73.54% 0.117 223.3)
XYZ	xyz(32.9095, 41.1801, 76.0119)
Luminance	0.4118 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B9DF #DF6842

analogous

#42DFB6 #42B9DF #426BDF

triadic

#42B9DF #DF42B9 #B9DF42

tetradic

#42B9DF #B642DF #DF6842 #6BDF42

square

#42B9DF #B642DF #DF6842 #6BDF42

split-complementary

#42B9DF #DF426B #DFB642

monochromatic

#18728E #219CC3 #42B9DF #76CCE8 #ABE0F1

Accessibility & contrast

On white

2.27

#42B9DF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.24

#42B9DF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B9DF

9.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B9DF	#FFFFFF	#000000	##000000
##42B9DF	1.00	2.27	9.24	9.24
#FFFFFF	2.27	1.00	21.00	21.00
#000000	9.24	21.00	1.00	1.00
##000000	9.24	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A3B5E1

Deuteranopia (green-blind)

#8EA5DF

Tritanopia (blue-blind)

#00C5C5

Achromatopsia (no color)

#ACACAC

Design tokens & code

CSS

--color: #42b9df;
/* rgb */ color: rgb(66, 185, 223);
/* oklch */ color: oklch(73.5% 0.117 223.3);

Tailwind

colors: {
  custom: {
    50: '#8acee9',
    500: '#42b9df',
    950: '#000000',
  },
}

SCSS

$custom: #42b9df;
$custom-light: #8acee9;
$custom-dark: #000000;

JSON

{
  "hex": "#42b9df",
  "rgb": {
    "r": 66,
    "g": 185,
    "b": 223
  },
  "hsl": {
    "h": 194.522,
    "s": 71.041,
    "l": 56.667
  },
  "oklch": {
    "l": 0.73541,
    "c": 0.11678,
    "h": 223.3
  },
  "luminance": 0.41184
}

Semantic roles & 50–950 ramp

primary

#42B9DF

secondary

#DFAE9E

accent

#663AEE

background

#F9FCFE

surface

#F1F9FC

border

#CBD2D5

text

#0D1316

muted

#7E8284

Preview Lab

Preview with #42B9DF

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

Preview Lab → · Contrast checker → · Palette generator →