#42B4CC#42B4CC

#42B4CC is a light, moderate cyan. Relative luminance 0.382; OKLCH L 71.6% C 0.106 H 214.4°. Best body text is #000000 at 8.63:1 contrast (WCAG AA passes).

Color values

HEX#42B4CC
RGBrgb(66, 180, 204)
HSLhsl(190, 58%, 53%)
HSVhsv(190, 68%, 80%)
CMYKcmyk(67.6%, 11.8%, 0%, 20%)
CIE-LABlab(68.14, -24.27, -21.53)
CIE-LCHlch(68.14, 32.44, 221.58°)
OKLaboklab(71.57% -0.0874 -0.0599)
OKLCHoklch(71.57% 0.106 214.4)
XYZxyz(29.4626, 38.1571, 62.9273)
Luminance0.3816 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#42B4CC #CC5A42
analogous
#42CC9F #42B4CC #426FCC
triadic
#42B4CC #CC42B4 #B4CC42
tetradic
#42B4CC #9F42CC #CC5A42 #6FCC42
square
#42B4CC #9F42CC #CC5A42 #6FCC42
split-complementary
#42B4CC #CC426F #CC9F42
monochromatic
#1F6574 #2C90A4 #42B4CC #72C7D9 #A2DAE6

Accessibility & contrast

On white

2.43
#42B4CC on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

8.63
#42B4CC on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B4CC
8.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##42B4CC#FFFFFF#000000##000000
##42B4CC1.002.438.638.63
#FFFFFF2.431.0021.0021.00
#0000008.6321.001.001.00
##0000008.6321.001.001.00

Color blindness preview

Protanopia (red-blind)
#A3AECD
Deuteranopia (green-blind)
#8FA0CC
Tritanopia (blue-blind)
#00BDBB
Achromatopsia (no color)
#A6A6A6

Design tokens & code

CSS
--color: #42b4cc;
/* rgb */ color: rgb(66, 180, 204);
/* oklch */ color: oklch(71.6% 0.106 214.4);
Tailwind
colors: {
  custom: {
    50: '#87cadb',
    500: '#42b4cc',
    950: '#000000',
  },
}
SCSS
$custom: #42b4cc;
$custom-light: #87cadb;
$custom-dark: #000000;
JSON
{
  "hex": "#42b4cc",
  "rgb": {
    "r": 66,
    "g": 180,
    "b": 204
  },
  "hsl": {
    "h": 190.435,
    "s": 57.5,
    "l": 52.941
  },
  "oklch": {
    "l": 0.71573,
    "c": 0.10594,
    "h": 214.4
  },
  "luminance": 0.3816
}

Semantic roles & 50–950 ramp

primary
#42B4CC
secondary
#D3A197
accent
#6247E1
background
#F9FCFD
surface
#F1F8FB
border
#CBD1D4
text
#0D1315
muted
#7E8283

Preview Lab

Preview with #42B4CC

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

Preview Lab → · Contrast checker → · Palette generator →

#42B4CC Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva