#42B8D4#42B8D4

#42B8D4 is a light, moderate cyan. Relative luminance 0.402; OKLCH L 72.8% C 0.110 H 216.8°. Best body text is #000000 at 9.04:1 contrast (WCAG AA passes).

Color values

HEX#42B8D4
RGBrgb(66, 184, 212)
HSLhsl(192, 63%, 55%)
HSVhsv(192, 69%, 83%)
CMYKcmyk(68.9%, 13.2%, 0%, 16.9%)
CIE-LABlab(69.60, -23.83, -23.68)
CIE-LCHlch(69.60, 33.59, 224.82°)
OKLaboklab(72.85% -0.0882 -0.066)
OKLCHoklch(72.85% 0.11 216.8)
XYZxyz(31.2660, 40.1892, 68.3841)
Luminance0.4019 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#42B8D4 #D45E42
analogous
#42D4A7 #42B8D4 #426FD4
triadic
#42B8D4 #D442B8 #B8D442
tetradic
#42B8D4 #A742D4 #D45E42 #6FD442
square
#42B8D4 #A742D4 #D45E42 #6FD442
split-complementary
#42B8D4 #D4426F #D4A742
monochromatic
#1D6C7F #2896B1 #42B8D4 #74CBDF #A6DDEB

Accessibility & contrast

On white

2.32
#42B8D4 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.04
#42B8D4 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B8D4
9.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##42B8D4#FFFFFF#000000##000000
##42B8D41.002.329.049.04
#FFFFFF2.321.0021.0021.00
#0000009.0421.001.001.00
##0000009.0421.001.001.00

Color blindness preview

Protanopia (red-blind)
#A5B3D6
Deuteranopia (green-blind)
#91A4D4
Tritanopia (blue-blind)
#00C2C1
Achromatopsia (no color)
#AAAAAA

Design tokens & code

CSS
--color: #42b8d4;
/* rgb */ color: rgb(66, 184, 212);
/* oklch */ color: oklch(72.8% 0.110 216.8);
Tailwind
colors: {
  custom: {
    50: '#88cde1',
    500: '#42b8d4',
    950: '#000000',
  },
}
SCSS
$custom: #42b8d4;
$custom-light: #88cde1;
$custom-dark: #000000;
JSON
{
  "hex": "#42b8d4",
  "rgb": {
    "r": 66,
    "g": 184,
    "b": 212
  },
  "hsl": {
    "h": 191.507,
    "s": 62.931,
    "l": 54.51
  },
  "oklch": {
    "l": 0.72847,
    "c": 0.11019,
    "h": 216.8
  },
  "luminance": 0.40193
}

Semantic roles & 50–950 ramp

primary
#42B8D4
secondary
#D8A69A
accent
#6142E6
background
#F9FCFD
surface
#F1F9FB
border
#CBD2D4
text
#0D1315
muted
#7E8283

Preview Lab

Preview with #42B8D4

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

Preview Lab → · Contrast checker → · Palette generator →

#42B8D4 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva