#42B5D8#42B5D8

#42B5D8 is a light, moderate cyan. Relative luminance 0.392; OKLCH L 72.3% C 0.113 H 222.0°. Best body text is #000000 at 8.83:1 contrast (WCAG AA passes).

Color values

HEX#42B5D8
RGBrgb(66, 181, 216)
HSLhsl(194, 66%, 55%)
HSVhsv(194, 69%, 85%)
CMYKcmyk(69.4%, 16.2%, 0%, 15.3%)
CIE-LABlab(68.87, -21.04, -27.00)
CIE-LCHlch(68.87, 34.23, 232.07°)
OKLaboklab(72.3% -0.0837 -0.0754)
OKLCHoklch(72.3% 0.113 222)
XYZxyz(31.1602, 39.1603, 70.8689)
Luminance0.3916 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#42B5D8 #D86542
analogous
#42D8B0 #42B5D8 #426AD8
triadic
#42B5D8 #D842B5 #B5D842
tetradic
#42B5D8 #B042D8 #D86542 #6AD842
square
#42B5D8 #B042D8 #D86542 #6AD842
split-complementary
#42B5D8 #D8426A #D8B042
monochromatic
#1B6C84 #2695B7 #42B5D8 #75C9E2 #A7DDED

Accessibility & contrast

On white

2.38
#42B5D8 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

8.83
#42B5D8 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B5D8
8.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##42B5D8#FFFFFF#000000##000000
##42B5D81.002.388.838.83
#FFFFFF2.381.0021.0021.00
#0000008.8321.001.001.00
##0000008.8321.001.001.00

Color blindness preview

Protanopia (red-blind)
#A1B1DA
Deuteranopia (green-blind)
#8CA1D8
Tritanopia (blue-blind)
#00C0C0
Achromatopsia (no color)
#A8A8A8

Design tokens & code

CSS
--color: #42b5d8;
/* rgb */ color: rgb(66, 181, 216);
/* oklch */ color: oklch(72.3% 0.113 222.0);
Tailwind
colors: {
  custom: {
    50: '#89cbe4',
    500: '#42b5d8',
    950: '#000000',
  },
}
SCSS
$custom: #42b5d8;
$custom-light: #89cbe4;
$custom-dark: #000000;
JSON
{
  "hex": "#42b5d8",
  "rgb": {
    "r": 66,
    "g": 181,
    "b": 216
  },
  "hsl": {
    "h": 194,
    "s": 65.789,
    "l": 55.294
  },
  "oklch": {
    "l": 0.72305,
    "c": 0.1127,
    "h": 222
  },
  "luminance": 0.39164
}

Semantic roles & 50–950 ramp

primary
#42B5D8
secondary
#DAAA9C
accent
#673FE9
background
#F9FCFD
surface
#F1F8FB
border
#CBD1D4
text
#0D1315
muted
#7E8283

Preview Lab

Preview with #42B5D8

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

Preview Lab → · Contrast checker → · Palette generator →

#42B5D8 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva