#42B9D8#42B9D8

#42B9D8 is a light, moderate cyan. Relative luminance 0.408; OKLCH L 73.2% C 0.112 H 218.7°. Best body text is #000000 at 9.16:1 contrast (WCAG AA passes).

Color values

HEX#42B9D8
RGBrgb(66, 185, 216)
HSLhsl(192, 66%, 55%)
HSVhsv(192, 69%, 85%)
CMYKcmyk(69.4%, 14.4%, 0%, 15.3%)
CIE-LABlab(70.04, -23.09, -25.20)
CIE-LCHlch(70.04, 34.18, 227.50°)
OKLaboklab(73.25% -0.0877 -0.0703)
OKLCHoklch(73.25% 0.112 218.7)
XYZxyz(31.9853, 40.8104, 71.1439)
Luminance0.4081 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#42B9D8 #D86142
analogous
#42D8AC #42B9D8 #426ED8
triadic
#42B9D8 #D842B9 #B9D842
tetradic
#42B9D8 #AC42D8 #D86142 #6ED842
square
#42B9D8 #AC42D8 #D86142 #6ED842
split-complementary
#42B9D8 #D8426E #D8AC42
monochromatic
#1B6F84 #2699B7 #42B9D8 #75CCE2 #A7DFED

Accessibility & contrast

On white

2.29
#42B9D8 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.16
#42B9D8 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B9D8
9.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##42B9D8#FFFFFF#000000##000000
##42B9D81.002.299.169.16
#FFFFFF2.291.0021.0021.00
#0000009.1621.001.001.00
##0000009.1621.001.001.00

Color blindness preview

Protanopia (red-blind)
#A5B4DA
Deuteranopia (green-blind)
#90A5D8
Tritanopia (blue-blind)
#00C3C3
Achromatopsia (no color)
#ABABAB

Design tokens & code

CSS
--color: #42b9d8;
/* rgb */ color: rgb(66, 185, 216);
/* oklch */ color: oklch(73.2% 0.112 218.7);
Tailwind
colors: {
  custom: {
    50: '#89cee4',
    500: '#42b9d8',
    950: '#000000',
  },
}
SCSS
$custom: #42b9d8;
$custom-light: #89cee4;
$custom-dark: #000000;
JSON
{
  "hex": "#42b9d8",
  "rgb": {
    "r": 66,
    "g": 185,
    "b": 216
  },
  "hsl": {
    "h": 192.4,
    "s": 65.789,
    "l": 55.294
  },
  "oklch": {
    "l": 0.73248,
    "c": 0.11238,
    "h": 218.7
  },
  "luminance": 0.40814
}

Semantic roles & 50–950 ramp

primary
#42B9D8
secondary
#DAA99C
accent
#623FE9
background
#F9FCFD
surface
#F1F9FB
border
#CBD2D4
text
#0D1315
muted
#7E8283

Preview Lab

Preview with #42B9D8

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

Preview Lab → · Contrast checker → · Palette generator →

#42B9D8 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva