#40B1D1#40B1D1

#40B1D1 is a light, moderate cyan. Relative luminance 0.371; OKLCH L 71.0% C 0.110 H 220.4°. Best body text is #000000 at 8.43:1 contrast (WCAG AA passes).

Color values

HEX#40B1D1
RGBrgb(64, 177, 209)
HSLhsl(193, 61%, 54%)
HSVhsv(193, 69%, 82%)
CMYKcmyk(69.4%, 15.3%, 0%, 18%)
CIE-LABlab(67.38, -21.47, -25.45)
CIE-LCHlch(67.38, 33.29, 229.85°)
OKLaboklab(71.01% -0.0834 -0.071)
OKLCHoklch(71.01% 0.11 220.4)
XYZxyz(29.3404, 37.1344, 65.9306)
Luminance0.3714 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#40B1D1 #D16040
analogous
#40D1A8 #40B1D1 #4068D1
triadic
#40B1D1 #D140B1 #B1D140
tetradic
#40B1D1 #A840D1 #D16040 #68D140
square
#40B1D1 #A840D1 #D16040 #68D140
split-complementary
#40B1D1 #D14068 #D1A840
monochromatic
#1D6579 #298EAB #40B1D1 #71C5DD #A3D9E9

Accessibility & contrast

On white

2.49
#40B1D1 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

8.43
#40B1D1 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B1D1
8.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##40B1D1#FFFFFF#000000##000000
##40B1D11.002.498.438.43
#FFFFFF2.491.0021.0021.00
#0000008.4321.001.001.00
##0000008.4321.001.001.00

Color blindness preview

Protanopia (red-blind)
#9EACD3
Deuteranopia (green-blind)
#899ED1
Tritanopia (blue-blind)
#00BBBB
Achromatopsia (no color)
#A4A4A4

Design tokens & code

CSS
--color: #40b1d1;
/* rgb */ color: rgb(64, 177, 209);
/* oklch */ color: oklch(71.0% 0.110 220.4);
Tailwind
colors: {
  custom: {
    50: '#87c8df',
    500: '#40b1d1',
    950: '#000000',
  },
}
SCSS
$custom: #40b1d1;
$custom-light: #87c8df;
$custom-dark: #000000;
JSON
{
  "hex": "#40b1d1",
  "rgb": {
    "r": 64,
    "g": 177,
    "b": 209
  },
  "hsl": {
    "h": 193.241,
    "s": 61.181,
    "l": 53.529
  },
  "oklch": {
    "l": 0.71009,
    "c": 0.10955,
    "h": 220.4
  },
  "luminance": 0.37138
}

Semantic roles & 50–950 ramp

primary
#40B1D1
secondary
#D5A597
accent
#6744E4
background
#F9FCFD
surface
#F1F8FB
border
#CBD1D4
text
#0D1315
muted
#7E8283

Preview Lab

Preview with #40B1D1

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

Preview Lab → · Contrast checker → · Palette generator →

#40B1D1 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva