#42B8DF#42B8DF

#42B8DF is a light, moderate cyan. Relative luminance 0.408; OKLCH L 73.3% C 0.117 H 224.1°. Best body text is #000000 at 9.15:1 contrast (WCAG AA passes).

Color values

HEX	#42B8DF
RGB	rgb(66, 184, 223)
HSL	hsl(195, 71%, 57%)
HSV	hsv(195, 70%, 87%)
CMYK	cmyk(70.4%, 17.5%, 0%, 12.5%)
CIE-LAB	lab(70.01, -20.37, -29.07)
CIE-LCH	lch(70.01, 35.50, 234.98°)
OKLab	oklab(73.31% -0.0841 -0.0813)
OKLCH	oklch(73.31% 0.117 224.1)
XYZ	xyz(32.7011, 40.7632, 75.9424)
Luminance	0.4077 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B8DF #DF6942

analogous

#42DFB7 #42B8DF #426ADF

triadic

#42B8DF #DF42B8 #B8DF42

tetradic

#42B8DF #B742DF #DF6942 #6ADF42

square

#42B8DF #B742DF #DF6942 #6ADF42

split-complementary

#42B8DF #DF426A #DFB742

monochromatic

#18718E #219BC3 #42B8DF #76CCE8 #ABDFF1

Accessibility & contrast

On white

2.29

#42B8DF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.15

#42B8DF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B8DF

9.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B8DF	#FFFFFF	#000000	##000000
##42B8DF	1.00	2.29	9.15	9.15
#FFFFFF	2.29	1.00	21.00	21.00
#000000	9.15	21.00	1.00	1.00
##000000	9.15	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A2B4E1

Deuteranopia (green-blind)

#8DA4DF

Tritanopia (blue-blind)

#00C4C5

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #42b8df;
/* rgb */ color: rgb(66, 184, 223);
/* oklch */ color: oklch(73.3% 0.117 224.1);

Tailwind

colors: {
  custom: {
    50: '#8acde9',
    500: '#42b8df',
    950: '#000000',
  },
}

SCSS

$custom: #42b8df;
$custom-light: #8acde9;
$custom-dark: #000000;

JSON

{
  "hex": "#42b8df",
  "rgb": {
    "r": 66,
    "g": 184,
    "b": 223
  },
  "hsl": {
    "h": 194.904,
    "s": 71.041,
    "l": 56.667
  },
  "oklch": {
    "l": 0.73307,
    "c": 0.11697,
    "h": 224.1
  },
  "luminance": 0.40767
}

Semantic roles & 50–950 ramp

primary

#42B8DF

secondary

#DFAE9E

accent

#673AEE

background

#F9FCFE

surface

#F1F9FC

border

#CBD2D5

text

#0D1316

muted

#7E8284

Preview Lab

Preview with #42B8DF

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

Preview Lab → · Contrast checker → · Palette generator →