#42C3DD#42C3DD

#42C3DD is a light, moderate cyan. Relative luminance 0.454; OKLCH L 75.8% C 0.115 H 214.0°. Best body text is #000000 at 10.08:1 contrast (WCAG AA passes).

Color values

HEX#42C3DD
RGBrgb(66, 195, 221)
HSLhsl(190, 70%, 56%)
HSVhsv(190, 70%, 87%)
CMYKcmyk(70.1%, 11.8%, 0%, 13.3%)
CIE-LABlab(73.16, -26.58, -23.16)
CIE-LCHlch(73.16, 35.25, 221.07°)
OKLaboklab(75.81% -0.0956 -0.0645)
OKLCHoklch(75.81% 0.115 214)
XYZxyz(34.8075, 45.4049, 75.3222)
Luminance0.4541 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#42C3DD #DD5C42
analogous
#42DDAA #42C3DD #4276DD
triadic
#42C3DD #DD42C3 #C3DD42
tetradic
#42C3DD #AA42DD #DD5C42 #76DD42
square
#42C3DD #AA42DD #DD5C42 #76DD42
split-complementary
#42C3DD #DD4276 #DDAA42
monochromatic
#19788C #22A5BF #42C3DD #76D3E6 #AAE4F0

Accessibility & contrast

On white

2.08
#42C3DD on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

10.08
#42C3DD on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42C3DD
10.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##42C3DD#FFFFFF#000000##000000
##42C3DD1.002.0810.0810.08
#FFFFFF2.081.0021.0021.00
#00000010.0821.001.001.00
##00000010.0821.001.001.00

Color blindness preview

Protanopia (red-blind)
#B0BDDF
Deuteranopia (green-blind)
#9AADDD
Tritanopia (blue-blind)
#00CDCB
Achromatopsia (no color)
#B4B4B4

Design tokens & code

CSS
--color: #42c3dd;
/* rgb */ color: rgb(66, 195, 221);
/* oklch */ color: oklch(75.8% 0.115 214.0);
Tailwind
colors: {
  custom: {
    50: '#8ad5e7',
    500: '#42c3dd',
    950: '#000000',
  },
}
SCSS
$custom: #42c3dd;
$custom-light: #8ad5e7;
$custom-dark: #000000;
JSON
{
  "hex": "#42c3dd",
  "rgb": {
    "r": 66,
    "g": 195,
    "b": 221
  },
  "hsl": {
    "h": 190.065,
    "s": 69.507,
    "l": 56.275
  },
  "oklch": {
    "l": 0.75811,
    "c": 0.11532,
    "h": 214
  },
  "luminance": 0.45409
}

Semantic roles & 50–950 ramp

primary
#42C3DD
secondary
#DDA89D
accent
#593BEC
background
#F9FDFE
surface
#F2FAFC
border
#CCD3D5
text
#0D1416
muted
#7E8384

Preview Lab

Preview with #42C3DD

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

Preview Lab → · Contrast checker → · Palette generator →

#42C3DD Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva