#40B9D5#40B9D5

#40B9D5 is a light, moderate cyan. Relative luminance 0.406; OKLCH L 73.1% C 0.112 H 216.5°. Best body text is #000000 at 9.12:1 contrast (WCAG AA passes).

Color values

HEX#40B9D5
RGBrgb(64, 185, 213)
HSLhsl(191, 64%, 54%)
HSVhsv(191, 70%, 84%)
CMYKcmyk(70%, 13.1%, 0%, 16.5%)
CIE-LABlab(69.89, -24.30, -23.80)
CIE-LCHlch(69.89, 34.02, 224.41°)
OKLaboklab(73.07% -0.0898 -0.0663)
OKLCHoklch(73.07% 0.112 216.5)
XYZxyz(31.4685, 40.5884, 69.1138)
Luminance0.4059 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#40B9D5 #D55C40
analogous
#40D5A6 #40B9D5 #406FD5
triadic
#40B9D5 #D540B9 #B9D540
tetradic
#40B9D5 #A640D5 #D55C40 #6FD540
square
#40B9D5 #A640D5 #D55C40 #6FD540
split-complementary
#40B9D5 #D5406F #D5A640
monochromatic
#1C6C7F #2797B1 #40B9D5 #72CBE0 #A4DEEB

Accessibility & contrast

On white

2.30
#40B9D5 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.12
#40B9D5 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B9D5
9.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##40B9D5#FFFFFF#000000##000000
##40B9D51.002.309.129.12
#FFFFFF2.301.0021.0021.00
#0000009.1221.001.001.00
##0000009.1221.001.001.00

Color blindness preview

Protanopia (red-blind)
#A6B3D7
Deuteranopia (green-blind)
#91A4D5
Tritanopia (blue-blind)
#00C3C2
Achromatopsia (no color)
#ABABAB

Design tokens & code

CSS
--color: #40b9d5;
/* rgb */ color: rgb(64, 185, 213);
/* oklch */ color: oklch(73.1% 0.112 216.5);
Tailwind
colors: {
  custom: {
    50: '#88cee2',
    500: '#40b9d5',
    950: '#000000',
  },
}
SCSS
$custom: #40b9d5;
$custom-light: #88cee2;
$custom-dark: #000000;
JSON
{
  "hex": "#40b9d5",
  "rgb": {
    "r": 64,
    "g": 185,
    "b": 213
  },
  "hsl": {
    "h": 191.275,
    "s": 63.948,
    "l": 54.314
  },
  "oklch": {
    "l": 0.73073,
    "c": 0.11165,
    "h": 216.5
  },
  "luminance": 0.40592
}

Semantic roles & 50–950 ramp

primary
#40B9D5
secondary
#D8A599
accent
#6041E7
background
#F9FCFD
surface
#F1F9FB
border
#CBD2D4
text
#0D1315
muted
#7E8283

Preview Lab

Preview with #40B9D5

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

Preview Lab → · Contrast checker → · Palette generator →

#40B9D5 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva