#42C0DD#42C0DD

#42C0DD is a light, moderate cyan. Relative luminance 0.441; OKLCH L 75.1% C 0.115 H 216.4°. Best body text is #000000 at 9.82:1 contrast (WCAG AA passes).

Color values

HEX	#42C0DD
RGB	rgb(66, 192, 221)
HSL	hsl(191, 70%, 56%)
HSV	hsv(191, 70%, 87%)
CMYK	cmyk(70.1%, 13.1%, 0%, 13.3%)
CIE-LAB	lab(72.28, -25.08, -24.50)
CIE-LCH	lch(72.28, 35.06, 224.34°)
OKLab	oklab(75.1% -0.0927 -0.0683)
OKLCH	oklch(75.1% 0.115 216.4)
XYZ	xyz(34.1421, 44.0741, 75.1003)
Luminance	0.4408 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42C0DD #DD5F42

analogous

#42DDAD #42C0DD #4273DD

triadic

#42C0DD #DD42C0 #C0DD42

tetradic

#42C0DD #AD42DD #DD5F42 #73DD42

square

#42C0DD #AD42DD #DD5F42 #73DD42

split-complementary

#42C0DD #DD4273 #DDAD42

monochromatic

#19768C #22A2BF #42C0DD #76D1E6 #AAE3F0

Accessibility & contrast

On white

2.14

#42C0DD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.82

#42C0DD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42C0DD

9.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42C0DD	#FFFFFF	#000000	##000000
##42C0DD	1.00	2.14	9.82	9.82
#FFFFFF	2.14	1.00	21.00	21.00
#000000	9.82	21.00	1.00	1.00
##000000	9.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ACBADF

Deuteranopia (green-blind)

#97AADD

Tritanopia (blue-blind)

#00CAC9

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #42c0dd;
/* rgb */ color: rgb(66, 192, 221);
/* oklch */ color: oklch(75.1% 0.115 216.4);

Tailwind

colors: {
  custom: {
    50: '#8ad3e7',
    500: '#42c0dd',
    950: '#000000',
  },
}

SCSS

$custom: #42c0dd;
$custom-light: #8ad3e7;
$custom-dark: #000000;

JSON

{
  "hex": "#42c0dd",
  "rgb": {
    "r": 66,
    "g": 192,
    "b": 221
  },
  "hsl": {
    "h": 191.226,
    "s": 69.507,
    "l": 56.275
  },
  "oklch": {
    "l": 0.75103,
    "c": 0.11512,
    "h": 216.4
  },
  "luminance": 0.44078
}

Semantic roles & 50–950 ramp

primary

#42C0DD

secondary

#DDA99D

accent

#5D3BEC

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0D1416

muted

#7E8284

Preview Lab

Preview with #42C0DD

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

Preview Lab → · Contrast checker → · Palette generator →