#40B5D8#40B5D8

#40B5D8 is a light, moderate cyan. Relative luminance 0.391; OKLCH L 72.3% C 0.114 H 221.8°. Best body text is #000000 at 8.82:1 contrast (WCAG AA passes).

Color values

HEX#40B5D8
RGBrgb(64, 181, 216)
HSLhsl(194, 66%, 55%)
HSVhsv(194, 70%, 85%)
CMYKcmyk(70.4%, 16.2%, 0%, 15.3%)
CIE-LABlab(68.82, -21.32, -27.08)
CIE-LCHlch(68.82, 34.47, 231.79°)
OKLaboklab(72.25% -0.0847 -0.0757)
OKLCHoklch(72.25% 0.114 221.8)
XYZxyz(31.0278, 39.0921, 70.8627)
Luminance0.3910 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#40B5D8 #D86340
analogous
#40D8AF #40B5D8 #4069D8
triadic
#40B5D8 #D840B5 #B5D840
tetradic
#40B5D8 #AF40D8 #D86340 #69D840
square
#40B5D8 #AF40D8 #D86340 #69D840
split-complementary
#40B5D8 #D84069 #D8AF40
monochromatic
#1B6B83 #2594B6 #40B5D8 #73C9E2 #A6DCED

Accessibility & contrast

On white

2.38
#40B5D8 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

8.82
#40B5D8 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B5D8
8.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##40B5D8#FFFFFF#000000##000000
##40B5D81.002.388.828.82
#FFFFFF2.381.0021.0021.00
#0000008.8221.001.001.00
##0000008.8221.001.001.00

Color blindness preview

Protanopia (red-blind)
#A0B1DA
Deuteranopia (green-blind)
#8BA1D8
Tritanopia (blue-blind)
#00C0C0
Achromatopsia (no color)
#A8A8A8

Design tokens & code

CSS
--color: #40b5d8;
/* rgb */ color: rgb(64, 181, 216);
/* oklch */ color: oklch(72.3% 0.114 221.8);
Tailwind
colors: {
  custom: {
    50: '#88cbe4',
    500: '#40b5d8',
    950: '#000000',
  },
}
SCSS
$custom: #40b5d8;
$custom-light: #88cbe4;
$custom-dark: #000000;
JSON
{
  "hex": "#40b5d8",
  "rgb": {
    "r": 64,
    "g": 181,
    "b": 216
  },
  "hsl": {
    "h": 193.816,
    "s": 66.087,
    "l": 54.902
  },
  "oklch": {
    "l": 0.72251,
    "c": 0.11359,
    "h": 221.8
  },
  "luminance": 0.39096
}

Semantic roles & 50–950 ramp

primary
#40B5D8
secondary
#DAA99A
accent
#663FE9
background
#F9FCFD
surface
#F1F8FB
border
#CBD1D4
text
#0D1315
muted
#7E8283

Preview Lab

Preview with #40B5D8

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

Preview Lab → · Contrast checker → · Palette generator →

#40B5D8 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva