#42B7DA#42B7DA

#42B7DA is a light, moderate cyan. Relative luminance 0.401; OKLCH L 72.9% C 0.114 H 221.7°. Best body text is #000000 at 9.02:1 contrast (WCAG AA passes).

Color values

HEX#42B7DA
RGBrgb(66, 183, 218)
HSLhsl(194, 67%, 56%)
HSVhsv(194, 70%, 85%)
CMYKcmyk(69.7%, 16.1%, 0%, 14.5%)
CIE-LABlab(69.53, -21.44, -27.08)
CIE-LCHlch(69.53, 34.54, 231.63°)
OKLaboklab(72.86% -0.0849 -0.0756)
OKLCHoklch(72.86% 0.114 221.7)
XYZxyz(31.8299, 40.0836, 72.3754)
Luminance0.4009 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#42B7DA #DA6542
analogous
#42DAB1 #42B7DA #426BDA
triadic
#42B7DA #DA42B7 #B7DA42
tetradic
#42B7DA #B142DA #DA6542 #6BDA42
square
#42B7DA #B142DA #DA6542 #6BDA42
split-complementary
#42B7DA #DA426B #DAB142
monochromatic
#1A6E87 #2498BA #42B7DA #75CAE4 #A8DEEE

Accessibility & contrast

On white

2.33
#42B7DA on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.02
#42B7DA on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B7DA
9.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##42B7DA#FFFFFF#000000##000000
##42B7DA1.002.339.029.02
#FFFFFF2.331.0021.0021.00
#0000009.0221.001.001.00
##0000009.0221.001.001.00

Color blindness preview

Protanopia (red-blind)
#A2B3DC
Deuteranopia (green-blind)
#8DA3DA
Tritanopia (blue-blind)
#00C2C2
Achromatopsia (no color)
#AAAAAA

Design tokens & code

CSS
--color: #42b7da;
/* rgb */ color: rgb(66, 183, 218);
/* oklch */ color: oklch(72.9% 0.114 221.7);
Tailwind
colors: {
  custom: {
    50: '#89cce5',
    500: '#42b7da',
    950: '#000000',
  },
}
SCSS
$custom: #42b7da;
$custom-light: #89cce5;
$custom-dark: #000000;
JSON
{
  "hex": "#42b7da",
  "rgb": {
    "r": 66,
    "g": 183,
    "b": 218
  },
  "hsl": {
    "h": 193.816,
    "s": 67.257,
    "l": 55.686
  },
  "oklch": {
    "l": 0.7286,
    "c": 0.11375,
    "h": 221.7
  },
  "luminance": 0.40087
}

Semantic roles & 50–950 ramp

primary
#42B7DA
secondary
#DBAB9C
accent
#653EEA
background
#F9FCFE
surface
#F1F9FC
border
#CBD2D5
text
#0D1315
muted
#7E8284

Preview Lab

Preview with #42B7DA

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

Preview Lab → · Contrast checker → · Palette generator →

#42B7DA Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva