#42B8DA#42B8DA

#42B8DA is a light, moderate cyan. Relative luminance 0.405; OKLCH L 73.1% C 0.114 H 220.9°. Best body text is #000000 at 9.10:1 contrast (WCAG AA passes).

Color values

HEX#42B8DA
RGBrgb(66, 184, 218)
HSLhsl(193, 67%, 56%)
HSVhsv(193, 70%, 85%)
CMYKcmyk(69.7%, 15.6%, 0%, 14.5%)
CIE-LABlab(69.82, -21.96, -26.63)
CIE-LCHlch(69.82, 34.51, 230.50°)
OKLaboklab(73.1% -0.0859 -0.0744)
OKLCHoklch(73.1% 0.114 220.9)
XYZxyz(32.0369, 40.4975, 72.4444)
Luminance0.4050 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#42B8DA #DA6442
analogous
#42DAB0 #42B8DA #426CDA
triadic
#42B8DA #DA42B8 #B8DA42
tetradic
#42B8DA #B042DA #DA6442 #6CDA42
square
#42B8DA #B042DA #DA6442 #6CDA42
split-complementary
#42B8DA #DA426C #DAB042
monochromatic
#1A6F87 #2499BA #42B8DA #75CBE4 #A8DEEE

Accessibility & contrast

On white

2.31
#42B8DA on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.10
#42B8DA on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B8DA
9.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##42B8DA#FFFFFF#000000##000000
##42B8DA1.002.319.109.10
#FFFFFF2.311.0021.0021.00
#0000009.1021.001.001.00
##0000009.1021.001.001.00

Color blindness preview

Protanopia (red-blind)
#A4B3DC
Deuteranopia (green-blind)
#8FA4DA
Tritanopia (blue-blind)
#00C3C3
Achromatopsia (no color)
#ABABAB

Design tokens & code

CSS
--color: #42b8da;
/* rgb */ color: rgb(66, 184, 218);
/* oklch */ color: oklch(73.1% 0.114 220.9);
Tailwind
colors: {
  custom: {
    50: '#89cde5',
    500: '#42b8da',
    950: '#000000',
  },
}
SCSS
$custom: #42b8da;
$custom-light: #89cde5;
$custom-dark: #000000;
JSON
{
  "hex": "#42b8da",
  "rgb": {
    "r": 66,
    "g": 184,
    "b": 218
  },
  "hsl": {
    "h": 193.421,
    "s": 67.257,
    "l": 55.686
  },
  "oklch": {
    "l": 0.73095,
    "c": 0.11365,
    "h": 220.9
  },
  "luminance": 0.40501
}

Semantic roles & 50–950 ramp

primary
#42B8DA
secondary
#DBAA9C
accent
#643EEA
background
#F9FCFE
surface
#F1F9FC
border
#CBD2D5
text
#0D1315
muted
#7E8284

Preview Lab

Preview with #42B8DA

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

Preview Lab → · Contrast checker → · Palette generator →

#42B8DA Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva