#42B1CC#42B1CC

#42B1CC is a light, moderate cyan. Relative luminance 0.370; OKLCH L 70.9% C 0.106 H 217.1°. Best body text is #000000 at 8.39:1 contrast (WCAG AA passes).

Color values

HEX#42B1CC
RGBrgb(66, 177, 204)
HSLhsl(192, 58%, 53%)
HSVhsv(192, 68%, 80%)
CMYKcmyk(67.6%, 13.2%, 0%, 20%)
CIE-LABlab(67.25, -22.74, -22.89)
CIE-LCHlch(67.25, 32.27, 225.18°)
OKLaboklab(70.86% -0.0843 -0.0638)
OKLCHoklch(70.86% 0.106 217.1)
XYZxyz(28.8635, 36.9590, 62.7277)
Luminance0.3696 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#42B1CC #CC5D42
analogous
#42CCA2 #42B1CC #426CCC
triadic
#42B1CC #CC42B1 #B1CC42
tetradic
#42B1CC #A242CC #CC5D42 #6CCC42
square
#42B1CC #A242CC #CC5D42 #6CCC42
split-complementary
#42B1CC #CC426C #CCA242
monochromatic
#1F6474 #2C8DA4 #42B1CC #72C5D9 #A2D9E6

Accessibility & contrast

On white

2.50
#42B1CC on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

8.39
#42B1CC on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B1CC
8.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##42B1CC#FFFFFF#000000##000000
##42B1CC1.002.508.398.39
#FFFFFF2.501.0021.0021.00
#0000008.3921.001.001.00
##0000008.3921.001.001.00

Color blindness preview

Protanopia (red-blind)
#9FACCE
Deuteranopia (green-blind)
#8C9ECC
Tritanopia (blue-blind)
#00BBB9
Achromatopsia (no color)
#A4A4A4

Design tokens & code

CSS
--color: #42b1cc;
/* rgb */ color: rgb(66, 177, 204);
/* oklch */ color: oklch(70.9% 0.106 217.1);
Tailwind
colors: {
  custom: {
    50: '#87c8db',
    500: '#42b1cc',
    950: '#000000',
  },
}
SCSS
$custom: #42b1cc;
$custom-light: #87c8db;
$custom-dark: #000000;
JSON
{
  "hex": "#42b1cc",
  "rgb": {
    "r": 66,
    "g": 177,
    "b": 204
  },
  "hsl": {
    "h": 191.739,
    "s": 57.5,
    "l": 52.941
  },
  "oklch": {
    "l": 0.70858,
    "c": 0.10572,
    "h": 217.1
  },
  "luminance": 0.36962
}

Semantic roles & 50–950 ramp

primary
#42B1CC
secondary
#D3A397
accent
#6547E1
background
#F8FCFD
surface
#F0F8FB
border
#CBD1D4
text
#0D1315
muted
#7D8283

Preview Lab

Preview with #42B1CC

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

Preview Lab → · Contrast checker → · Palette generator →

#42B1CC Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva