#40B1D9#40B1D9

#40B1D9 is a light, moderate cyan. Relative luminance 0.375; OKLCH L 71.4% C 0.115 H 225.7°. Best body text is #000000 at 8.51:1 contrast (WCAG AA passes).

Color values

HEX#40B1D9
RGBrgb(64, 177, 217)
HSLhsl(196, 67%, 55%)
HSVhsv(196, 71%, 85%)
CMYKcmyk(70.5%, 18.4%, 0%, 14.9%)
CIE-LABlab(67.68, -18.92, -29.38)
CIE-LCHlch(67.68, 34.95, 237.22°)
OKLaboklab(71.35% -0.0804 -0.0823)
OKLCHoklch(71.35% 0.115 225.7)
XYZxyz(30.3558, 37.5406, 71.2784)
Luminance0.3754 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#40B1D9 #D96840
analogous
#40D9B4 #40B1D9 #4065D9
triadic
#40B1D9 #D940B1 #B1D940
tetradic
#40B1D9 #B440D9 #D96840 #65D940
square
#40B1D9 #B440D9 #D96840 #65D940
split-complementary
#40B1D9 #D94065 #D9B440
monochromatic
#1A6984 #2491B7 #40B1D9 #73C6E3 #A6DBED

Accessibility & contrast

On white

2.47
#40B1D9 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

8.51
#40B1D9 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B1D9
8.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##40B1D9#FFFFFF#000000##000000
##40B1D91.002.478.518.51
#FFFFFF2.471.0021.0021.00
#0000008.5121.001.001.00
##0000008.5121.001.001.00

Color blindness preview

Protanopia (red-blind)
#9BADDB
Deuteranopia (green-blind)
#869ED9
Tritanopia (blue-blind)
#00BDBE
Achromatopsia (no color)
#A5A5A5

Design tokens & code

CSS
--color: #40b1d9;
/* rgb */ color: rgb(64, 177, 217);
/* oklch */ color: oklch(71.4% 0.115 225.7);
Tailwind
colors: {
  custom: {
    50: '#88c8e5',
    500: '#40b1d9',
    950: '#000000',
  },
}
SCSS
$custom: #40b1d9;
$custom-light: #88c8e5;
$custom-dark: #000000;
JSON
{
  "hex": "#40b1d9",
  "rgb": {
    "r": 64,
    "g": 177,
    "b": 217
  },
  "hsl": {
    "h": 195.686,
    "s": 66.812,
    "l": 55.098
  },
  "oklch": {
    "l": 0.71352,
    "c": 0.11503,
    "h": 225.7
  },
  "luminance": 0.37544
}

Semantic roles & 50–950 ramp

primary
#40B1D9
secondary
#DAAB9A
accent
#6B3EEA
background
#F9FCFD
surface
#F1F8FB
border
#CBD1D4
text
#0D1315
muted
#7E8283

Preview Lab

Preview with #40B1D9

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

Preview Lab → · Contrast checker → · Palette generator →

#40B1D9 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva