#40B9D7#40B9D7

#40B9D7 is a light, moderate cyan. Relative luminance 0.407; OKLCH L 73.2% C 0.113 H 217.8°. Best body text is #000000 at 9.14:1 contrast (WCAG AA passes).

Color values

HEX#40B9D7
RGBrgb(64, 185, 215)
HSLhsl(192, 65%, 55%)
HSVhsv(192, 70%, 84%)
CMYKcmyk(70.2%, 14%, 0%, 15.7%)
CIE-LABlab(69.96, -23.68, -24.79)
CIE-LCHlch(69.96, 34.28, 226.31°)
OKLaboklab(73.15% -0.089 -0.0691)
OKLCHoklch(73.15% 0.113 217.8)
XYZxyz(31.7239, 40.6906, 70.4589)
Luminance0.4069 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#40B9D7 #D75E40
analogous
#40D7AA #40B9D7 #406DD7
triadic
#40B9D7 #D740B9 #B9D740
tetradic
#40B9D7 #AA40D7 #D75E40 #6DD740
square
#40B9D7 #AA40D7 #D75E40 #6DD740
split-complementary
#40B9D7 #D7406D #D7AA40
monochromatic
#1B6D81 #2698B4 #40B9D7 #73CCE2 #A5DEEC

Accessibility & contrast

On white

2.30
#40B9D7 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.14
#40B9D7 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B9D7
9.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##40B9D7#FFFFFF#000000##000000
##40B9D71.002.309.149.14
#FFFFFF2.301.0021.0021.00
#0000009.1421.001.001.00
##0000009.1421.001.001.00

Color blindness preview

Protanopia (red-blind)
#A6B4D9
Deuteranopia (green-blind)
#91A4D7
Tritanopia (blue-blind)
#00C3C2
Achromatopsia (no color)
#ABABAB

Design tokens & code

CSS
--color: #40b9d7;
/* rgb */ color: rgb(64, 185, 215);
/* oklch */ color: oklch(73.2% 0.113 217.8);
Tailwind
colors: {
  custom: {
    50: '#88cee3',
    500: '#40b9d7',
    950: '#000000',
  },
}
SCSS
$custom: #40b9d7;
$custom-light: #88cee3;
$custom-dark: #000000;
JSON
{
  "hex": "#40b9d7",
  "rgb": {
    "r": 64,
    "g": 185,
    "b": 215
  },
  "hsl": {
    "h": 191.921,
    "s": 65.368,
    "l": 54.706
  },
  "oklch": {
    "l": 0.73154,
    "c": 0.11271,
    "h": 217.8
  },
  "luminance": 0.40694
}

Semantic roles & 50–950 ramp

primary
#40B9D7
secondary
#D9A69A
accent
#613FE8
background
#F9FCFD
surface
#F1F9FB
border
#CBD2D4
text
#0D1315
muted
#7E8283

Preview Lab

Preview with #40B9D7

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

Preview Lab → · Contrast checker → · Palette generator →

#40B9D7 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva