#42C0DF#42C0DF

#42C0DF is a light, moderate cyan. Relative luminance 0.442; OKLCH L 75.2% C 0.116 H 217.7°. Best body text is #000000 at 9.84:1 contrast (WCAG AA passes).

Color values

HEX	#42C0DF
RGB	rgb(66, 192, 223)
HSL	hsl(192, 71%, 57%)
HSV	hsv(192, 70%, 87%)
CMYK	cmyk(70.4%, 13.9%, 0%, 12.5%)
CIE-LAB	lab(72.35, -24.46, -25.48)
CIE-LCH	lch(72.35, 35.32, 226.17°)
OKLab	oklab(75.18% -0.0919 -0.0711)
OKLCH	oklch(75.18% 0.116 217.7)
XYZ	xyz(34.4101, 44.1813, 76.5121)
Luminance	0.4419 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42C0DF #DF6142

analogous

#42DFB0 #42C0DF #4272DF

triadic

#42C0DF #DF42C0 #C0DF42

tetradic

#42C0DF #B042DF #DF6142 #72DF42

square

#42C0DF #B042DF #DF6142 #72DF42

split-complementary

#42C0DF #DF4272 #DFB042

monochromatic

#18778E #21A3C3 #42C0DF #76D1E8 #ABE3F1

Accessibility & contrast

On white

2.13

#42C0DF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.84

#42C0DF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42C0DF

9.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42C0DF	#FFFFFF	#000000	##000000
##42C0DF	1.00	2.13	9.84	9.84
#FFFFFF	2.13	1.00	21.00	21.00
#000000	9.84	21.00	1.00	1.00
##000000	9.84	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ACBAE1

Deuteranopia (green-blind)

#96ABDF

Tritanopia (blue-blind)

#00CBCA

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #42c0df;
/* rgb */ color: rgb(66, 192, 223);
/* oklch */ color: oklch(75.2% 0.116 217.7);

Tailwind

colors: {
  custom: {
    50: '#8ad3e9',
    500: '#42c0df',
    950: '#000000',
  },
}

SCSS

$custom: #42c0df;
$custom-light: #8ad3e9;
$custom-dark: #000000;

JSON

{
  "hex": "#42c0df",
  "rgb": {
    "r": 66,
    "g": 192,
    "b": 223
  },
  "hsl": {
    "h": 191.847,
    "s": 71.041,
    "l": 56.667
  },
  "oklch": {
    "l": 0.75184,
    "c": 0.11616,
    "h": 217.7
  },
  "luminance": 0.44185
}

Semantic roles & 50–950 ramp

primary

#42C0DF

secondary

#DFAB9E

accent

#5E3AEE

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0D1416

muted

#7E8284

Preview Lab

Preview with #42C0DF

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

Preview Lab → · Contrast checker → · Palette generator →