#42BCDF#42BCDF

#42BCDF is a light, moderate cyan. Relative luminance 0.425; OKLCH L 74.2% C 0.116 H 220.9°. Best body text is #000000 at 9.49:1 contrast (WCAG AA passes).

Color values

HEX	#42BCDF
RGB	rgb(66, 188, 223)
HSL	hsl(193, 71%, 57%)
HSV	hsv(193, 70%, 87%)
CMYK	cmyk(70.4%, 15.7%, 0%, 12.5%)
CIE-LAB	lab(71.18, -22.43, -27.28)
CIE-LCH	lch(71.18, 35.31, 230.57°)
OKLab	oklab(74.25% -0.088 -0.0762)
OKLCH	oklch(74.25% 0.116 220.9)
XYZ	xyz(33.5438, 42.4486, 76.2233)
Luminance	0.4245 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42BCDF #DF6542

analogous

#42DFB4 #42BCDF #426EDF

triadic

#42BCDF #DF42BC #BCDF42

tetradic

#42BCDF #B442DF #DF6542 #6EDF42

square

#42BCDF #B442DF #DF6542 #6EDF42

split-complementary

#42BCDF #DF426E #DFB442

monochromatic

#18748E #219FC3 #42BCDF #76CFE8 #ABE1F1

Accessibility & contrast

On white

2.21

#42BCDF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.49

#42BCDF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42BCDF

9.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42BCDF	#FFFFFF	#000000	##000000
##42BCDF	1.00	2.21	9.49	9.49
#FFFFFF	2.21	1.00	21.00	21.00
#000000	9.49	21.00	1.00	1.00
##000000	9.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A7B7E1

Deuteranopia (green-blind)

#91A7DF

Tritanopia (blue-blind)

#00C7C7

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #42bcdf;
/* rgb */ color: rgb(66, 188, 223);
/* oklch */ color: oklch(74.2% 0.116 220.9);

Tailwind

colors: {
  custom: {
    50: '#8ad0e9',
    500: '#42bcdf',
    950: '#000000',
  },
}

SCSS

$custom: #42bcdf;
$custom-light: #8ad0e9;
$custom-dark: #000000;

JSON

{
  "hex": "#42bcdf",
  "rgb": {
    "r": 66,
    "g": 188,
    "b": 223
  },
  "hsl": {
    "h": 193.376,
    "s": 71.041,
    "l": 56.667
  },
  "oklch": {
    "l": 0.74245,
    "c": 0.11638,
    "h": 220.9
  },
  "luminance": 0.42452
}

Semantic roles & 50–950 ramp

primary

#42BCDF

secondary

#DFAD9E

accent

#623AEE

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0D1416

muted

#7E8284

Preview Lab

Preview with #42BCDF

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

Preview Lab → · Contrast checker → · Palette generator →