#40B8D6#40B8D6

#40B8D6 is a light, moderate cyan. Relative luminance 0.402; OKLCH L 72.9% C 0.112 H 218.0°. Best body text is #000000 at 9.05:1 contrast (WCAG AA passes).

Color values

HEX#40B8D6
RGBrgb(64, 184, 214)
HSLhsl(192, 65%, 55%)
HSVhsv(192, 70%, 84%)
CMYKcmyk(70.1%, 14%, 0%, 16.1%)
CIE-LABlab(69.63, -23.48, -24.75)
CIE-LCHlch(69.63, 34.11, 226.50°)
OKLaboklab(72.88% -0.0884 -0.069)
OKLCHoklch(72.88% 0.112 218)
XYZxyz(31.3874, 40.2224, 69.7148)
Luminance0.4023 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#40B8D6 #D65E40
analogous
#40D6A9 #40B8D6 #406DD6
triadic
#40B8D6 #D640B8 #B8D640
tetradic
#40B8D6 #A940D6 #D65E40 #6DD640
square
#40B8D6 #A940D6 #D65E40 #6DD640
split-complementary
#40B8D6 #D6406D #D6A940
monochromatic
#1B6C80 #2696B2 #40B8D6 #72CBE1 #A5DDEC

Accessibility & contrast

On white

2.32
#40B8D6 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.05
#40B8D6 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B8D6
9.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##40B8D6#FFFFFF#000000##000000
##40B8D61.002.329.059.05
#FFFFFF2.321.0021.0021.00
#0000009.0521.001.001.00
##0000009.0521.001.001.00

Color blindness preview

Protanopia (red-blind)
#A5B3D8
Deuteranopia (green-blind)
#90A3D6
Tritanopia (blue-blind)
#00C2C1
Achromatopsia (no color)
#AAAAAA

Design tokens & code

CSS
--color: #40b8d6;
/* rgb */ color: rgb(64, 184, 214);
/* oklch */ color: oklch(72.9% 0.112 218.0);
Tailwind
colors: {
  custom: {
    50: '#88cde2',
    500: '#40b8d6',
    950: '#000000',
  },
}
SCSS
$custom: #40b8d6;
$custom-light: #88cde2;
$custom-dark: #000000;
JSON
{
  "hex": "#40b8d6",
  "rgb": {
    "r": 64,
    "g": 184,
    "b": 214
  },
  "hsl": {
    "h": 192,
    "s": 64.655,
    "l": 54.51
  },
  "oklch": {
    "l": 0.72877,
    "c": 0.11217,
    "h": 218
  },
  "luminance": 0.40226
}

Semantic roles & 50–950 ramp

primary
#40B8D6
secondary
#D9A699
accent
#6240E8
background
#F9FCFD
surface
#F1F9FB
border
#CBD2D4
text
#0D1315
muted
#7E8283

Preview Lab

Preview with #40B8D6

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

Preview Lab → · Contrast checker → · Palette generator →

#40B8D6 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva