#42C1DF#42C1DF

#42C1DF is a light, moderate cyan. Relative luminance 0.446; OKLCH L 75.4% C 0.116 H 216.9°. Best body text is #000000 at 9.93:1 contrast (WCAG AA passes).

Color values

HEX	#42C1DF
RGB	rgb(66, 193, 223)
HSL	hsl(191, 71%, 57%)
HSV	hsv(191, 70%, 87%)
CMYK	cmyk(70.4%, 13.5%, 0%, 12.5%)
CIE-LAB	lab(72.64, -24.96, -25.03)
CIE-LCH	lch(72.64, 35.35, 225.08°)
OKLab	oklab(75.42% -0.0929 -0.0698)
OKLCH	oklch(75.42% 0.116 216.9)
XYZ	xyz(34.6304, 44.6219, 76.5855)
Luminance	0.4463 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42C1DF #DF6042

analogous

#42DFAF #42C1DF #4273DF

triadic

#42C1DF #DF42C1 #C1DF42

tetradic

#42C1DF #AF42DF #DF6042 #73DF42

square

#42C1DF #AF42DF #DF6042 #73DF42

split-complementary

#42C1DF #DF4273 #DFAF42

monochromatic

#18788E #21A4C3 #42C1DF #76D2E8 #ABE3F1

Accessibility & contrast

On white

2.12

#42C1DF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.93

#42C1DF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42C1DF

9.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42C1DF	#FFFFFF	#000000	##000000
##42C1DF	1.00	2.12	9.93	9.93
#FFFFFF	2.12	1.00	21.00	21.00
#000000	9.93	21.00	1.00	1.00
##000000	9.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ADBBE1

Deuteranopia (green-blind)

#97ABDF

Tritanopia (blue-blind)

#00CCCA

Achromatopsia (no color)

#B2B2B2

Design tokens & code

CSS

--color: #42c1df;
/* rgb */ color: rgb(66, 193, 223);
/* oklch */ color: oklch(75.4% 0.116 216.9);

Tailwind

colors: {
  custom: {
    50: '#8ad4e9',
    500: '#42c1df',
    950: '#000000',
  },
}

SCSS

$custom: #42c1df;
$custom-light: #8ad4e9;
$custom-dark: #000000;

JSON

{
  "hex": "#42c1df",
  "rgb": {
    "r": 66,
    "g": 193,
    "b": 223
  },
  "hsl": {
    "h": 191.465,
    "s": 71.041,
    "l": 56.667
  },
  "oklch": {
    "l": 0.7542,
    "c": 0.11617,
    "h": 216.9
  },
  "luminance": 0.44626
}

Semantic roles & 50–950 ramp

primary

#42C1DF

secondary

#DFAB9E

accent

#5C3AEE

background

#F9FDFE

surface

#F2FAFC

border

#CCD3D5

text

#0D1416

muted

#7E8384

Preview Lab

Preview with #42C1DF

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

Preview Lab → · Contrast checker → · Palette generator →