#40B4D0#40B4D0

#40B4D0 is a light, moderate cyan. Relative luminance 0.383; OKLCH L 71.7% C 0.109 H 217.2°. Best body text is #000000 at 8.66:1 contrast (WCAG AA passes).

Color values

HEX#40B4D0
RGBrgb(64, 180, 208)
HSLhsl(192, 61%, 53%)
HSVhsv(192, 69%, 82%)
CMYKcmyk(69.2%, 13.5%, 0%, 18.4%)
CIE-LABlab(68.23, -23.32, -23.59)
CIE-LCHlch(68.23, 33.17, 225.33°)
OKLaboklab(71.68% -0.0868 -0.0658)
OKLCHoklch(71.68% 0.109 217.2)
XYZxyz(29.8160, 38.2832, 65.4803)
Luminance0.3829 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#40B4D0 #D05C40
analogous
#40D0A4 #40B4D0 #406CD0
triadic
#40B4D0 #D040B4 #B4D040
tetradic
#40B4D0 #A440D0 #D05C40 #6CD040
square
#40B4D0 #A440D0 #D05C40 #6CD040
split-complementary
#40B4D0 #D0406C #D0A440
monochromatic
#1E6678 #2A90A9 #40B4D0 #71C7DC #A2DBE8

Accessibility & contrast

On white

2.43
#40B4D0 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

8.66
#40B4D0 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B4D0
8.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##40B4D0#FFFFFF#000000##000000
##40B4D01.002.438.668.66
#FFFFFF2.431.0021.0021.00
#0000008.6621.001.001.00
##0000008.6621.001.001.00

Color blindness preview

Protanopia (red-blind)
#A2AFD2
Deuteranopia (green-blind)
#8DA0D0
Tritanopia (blue-blind)
#00BEBD
Achromatopsia (no color)
#A6A6A6

Design tokens & code

CSS
--color: #40b4d0;
/* rgb */ color: rgb(64, 180, 208);
/* oklch */ color: oklch(71.7% 0.109 217.2);
Tailwind
colors: {
  custom: {
    50: '#87cade',
    500: '#40b4d0',
    950: '#000000',
  },
}
SCSS
$custom: #40b4d0;
$custom-light: #87cade;
$custom-dark: #000000;
JSON
{
  "hex": "#40b4d0",
  "rgb": {
    "r": 64,
    "g": 180,
    "b": 208
  },
  "hsl": {
    "h": 191.667,
    "s": 60.504,
    "l": 53.333
  },
  "oklch": {
    "l": 0.71681,
    "c": 0.10888,
    "h": 217.2
  },
  "luminance": 0.38287
}

Semantic roles & 50–950 ramp

primary
#40B4D0
secondary
#D5A397
accent
#6344E4
background
#F9FCFD
surface
#F1F8FB
border
#CBD1D4
text
#0D1315
muted
#7E8283

Preview Lab

Preview with #40B4D0

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

Preview Lab → · Contrast checker → · Palette generator →

#40B4D0 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva