#42BFDF#42BFDF

#42BFDF is a light, moderate cyan. Relative luminance 0.437; OKLCH L 74.9% C 0.116 H 218.5°. Best body text is #000000 at 9.75:1 contrast (WCAG AA passes).

Color values

HEX	#42BFDF
RGB	rgb(66, 191, 223)
HSL	hsl(192, 71%, 57%)
HSV	hsv(192, 70%, 87%)
CMYK	cmyk(70.4%, 14.3%, 0%, 12.5%)
CIE-LAB	lab(72.06, -23.95, -25.93)
CIE-LCH	lch(72.06, 35.30, 227.27°)
OKLab	oklab(74.95% -0.0909 -0.0723)
OKLCH	oklch(74.95% 0.116 218.5)
XYZ	xyz(34.1913, 43.7436, 76.4391)
Luminance	0.4375 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42BFDF #DF6242

analogous

#42DFB0 #42BFDF #4271DF

triadic

#42BFDF #DF42BF #BFDF42

tetradic

#42BFDF #B042DF #DF6242 #71DF42

square

#42BFDF #B042DF #DF6242 #71DF42

split-complementary

#42BFDF #DF4271 #DFB042

monochromatic

#18768E #21A2C3 #42BFDF #76D1E8 #ABE2F1

Accessibility & contrast

On white

2.15

#42BFDF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.75

#42BFDF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42BFDF

9.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42BFDF	#FFFFFF	#000000	##000000
##42BFDF	1.00	2.15	9.75	9.75
#FFFFFF	2.15	1.00	21.00	21.00
#000000	9.75	21.00	1.00	1.00
##000000	9.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ABBAE1

Deuteranopia (green-blind)

#95AADF

Tritanopia (blue-blind)

#00CAC9

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #42bfdf;
/* rgb */ color: rgb(66, 191, 223);
/* oklch */ color: oklch(74.9% 0.116 218.5);

Tailwind

colors: {
  custom: {
    50: '#8ad2e9',
    500: '#42bfdf',
    950: '#000000',
  },
}

SCSS

$custom: #42bfdf;
$custom-light: #8ad2e9;
$custom-dark: #000000;

JSON

{
  "hex": "#42bfdf",
  "rgb": {
    "r": 66,
    "g": 191,
    "b": 223
  },
  "hsl": {
    "h": 192.229,
    "s": 71.041,
    "l": 56.667
  },
  "oklch": {
    "l": 0.74949,
    "c": 0.11619,
    "h": 218.5
  },
  "luminance": 0.43748
}

Semantic roles & 50–950 ramp

primary

#42BFDF

secondary

#DFAB9E

accent

#5F3AEE

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0D1416

muted

#7E8284

Preview Lab

Preview with #42BFDF

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

Preview Lab → · Contrast checker → · Palette generator →