#42B4DC#42B4DC

#42B4DC is a light, moderate cyan. Relative luminance 0.390; OKLCH L 72.2% C 0.116 H 225.4°. Best body text is #000000 at 8.79:1 contrast (WCAG AA passes).

Color values

HEX#42B4DC
RGBrgb(66, 180, 220)
HSLhsl(196, 69%, 56%)
HSVhsv(196, 70%, 86%)
CMYKcmyk(70%, 18.2%, 0%, 13.7%)
CIE-LABlab(68.73, -19.25, -29.41)
CIE-LCHlch(68.73, 35.15, 236.79°)
OKLaboklab(72.24% -0.0812 -0.0823)
OKLCHoklch(72.24% 0.116 225.4)
XYZxyz(31.4810, 38.9645, 73.5580)
Luminance0.3897 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#42B4DC #DC6A42
analogous
#42DCB7 #42B4DC #4267DC
triadic
#42B4DC #DC42B4 #B4DC42
tetradic
#42B4DC #B742DC #DC6A42 #67DC42
square
#42B4DC #B742DC #DC6A42 #67DC42
split-complementary
#42B4DC #DC4267 #DCB742
monochromatic
#1A6D8A #2396BE #42B4DC #76C8E6 #A9DDEF

Accessibility & contrast

On white

2.39
#42B4DC on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

8.79
#42B4DC on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B4DC
8.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##42B4DC#FFFFFF#000000##000000
##42B4DC1.002.398.798.79
#FFFFFF2.391.0021.0021.00
#0000008.7921.001.001.00
##0000008.7921.001.001.00

Color blindness preview

Protanopia (red-blind)
#9EB0DE
Deuteranopia (green-blind)
#89A1DC
Tritanopia (blue-blind)
#00C0C1
Achromatopsia (no color)
#A8A8A8

Design tokens & code

CSS
--color: #42b4dc;
/* rgb */ color: rgb(66, 180, 220);
/* oklch */ color: oklch(72.2% 0.116 225.4);
Tailwind
colors: {
  custom: {
    50: '#89cae7',
    500: '#42b4dc',
    950: '#000000',
  },
}
SCSS
$custom: #42b4dc;
$custom-light: #89cae7;
$custom-dark: #000000;
JSON
{
  "hex": "#42b4dc",
  "rgb": {
    "r": 66,
    "g": 180,
    "b": 220
  },
  "hsl": {
    "h": 195.584,
    "s": 68.75,
    "l": 56.078
  },
  "oklch": {
    "l": 0.72241,
    "c": 0.11566,
    "h": 225.4
  },
  "luminance": 0.38968
}

Semantic roles & 50–950 ramp

primary
#42B4DC
secondary
#DDAE9D
accent
#6A3CEC
background
#F9FCFE
surface
#F1F8FC
border
#CBD1D5
text
#0D1316
muted
#7E8284

Preview Lab

Preview with #42B4DC

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

Preview Lab → · Contrast checker → · Palette generator →

#42B4DC Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva