#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
RGBrgb(66, 192, 221)
HSLhsl(191, 70%, 56%)
HSVhsv(191, 70%, 87%)
CMYKcmyk(70.1%, 13.1%, 0%, 13.3%)
CIE-LABlab(72.28, -25.08, -24.50)
CIE-LCHlch(72.28, 35.06, 224.34°)
OKLaboklab(75.1% -0.0927 -0.0683)
OKLCHoklch(75.1% 0.115 216.4)
XYZxyz(34.1421, 44.0741, 75.1003)
Luminance0.4408 (WCAG relative)
Temperaturecool
Familycyan

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
##42C0DD1.002.149.829.82
#FFFFFF2.141.0021.0021.00
#0000009.8221.001.001.00
##0000009.8221.001.001.00

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 →

#42C0DD Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva