#40B8D6#40B8D6

#40B8D6 is a light, moderate cyan. Relative luminance 0.402; OKLCH L 72.9% C 0.112 H 218.0°. Best body text is #000000 at 9.05:1 contrast (WCAG AA passes).

Color values

HEX	#40B8D6
RGB	rgb(64, 184, 214)
HSL	hsl(192, 65%, 55%)
HSV	hsv(192, 70%, 84%)
CMYK	cmyk(70.1%, 14%, 0%, 16.1%)
CIE-LAB	lab(69.63, -23.48, -24.75)
CIE-LCH	lch(69.63, 34.11, 226.50°)
OKLab	oklab(72.88% -0.0884 -0.069)
OKLCH	oklch(72.88% 0.112 218)
XYZ	xyz(31.3874, 40.2224, 69.7148)
Luminance	0.4023 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40B8D6 #D65E40

analogous

#40D6A9 #40B8D6 #406DD6

triadic

#40B8D6 #D640B8 #B8D640

tetradic

#40B8D6 #A940D6 #D65E40 #6DD640

square

#40B8D6 #A940D6 #D65E40 #6DD640

split-complementary

#40B8D6 #D6406D #D6A940

monochromatic

#1B6C80 #2696B2 #40B8D6 #72CBE1 #A5DDEC

Accessibility & contrast

On white

2.32

#40B8D6 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.05

#40B8D6 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B8D6

9.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40B8D6	#FFFFFF	#000000	##000000
##40B8D6	1.00	2.32	9.05	9.05
#FFFFFF	2.32	1.00	21.00	21.00
#000000	9.05	21.00	1.00	1.00
##000000	9.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A5B3D8

Deuteranopia (green-blind)

#90A3D6

Tritanopia (blue-blind)

#00C2C1

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #40b8d6;
/* rgb */ color: rgb(64, 184, 214);
/* oklch */ color: oklch(72.9% 0.112 218.0);

Tailwind

colors: {
  custom: {
    50: '#88cde2',
    500: '#40b8d6',
    950: '#000000',
  },
}

SCSS

$custom: #40b8d6;
$custom-light: #88cde2;
$custom-dark: #000000;

JSON

{
  "hex": "#40b8d6",
  "rgb": {
    "r": 64,
    "g": 184,
    "b": 214
  },
  "hsl": {
    "h": 192,
    "s": 64.655,
    "l": 54.51
  },
  "oklch": {
    "l": 0.72877,
    "c": 0.11217,
    "h": 218
  },
  "luminance": 0.40226
}

Semantic roles & 50–950 ramp

primary

#40B8D6

secondary

#D9A699

accent

#6240E8

background

#F9FCFD

surface

#F1F9FB

border

#CBD2D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #40B8D6

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

Preview Lab → · Contrast checker → · Palette generator →