#40B8D8#40B8D8

#40B8D8 is a light, moderate cyan. Relative luminance 0.403; OKLCH L 73.0% C 0.113 H 219.3°. Best body text is #000000 at 9.07:1 contrast (WCAG AA passes).

Color values

HEX	#40B8D8
RGB	rgb(64, 184, 216)
HSL	hsl(193, 66%, 55%)
HSV	hsv(193, 70%, 85%)
CMYK	cmyk(70.4%, 14.8%, 0%, 15.3%)
CIE-LAB	lab(69.70, -22.86, -25.73)
CIE-LCH	lch(69.70, 34.41, 228.38°)
OKLab	oklab(72.96% -0.0876 -0.0718)
OKLCH	oklch(72.96% 0.113 219.3)
XYZ	xyz(31.6444, 40.3252, 71.0682)
Luminance	0.4033 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40B8D8 #D86040

analogous

#40D8AC #40B8D8 #406CD8

triadic

#40B8D8 #D840B8 #B8D840

tetradic

#40B8D8 #AC40D8 #D86040 #6CD840

square

#40B8D8 #AC40D8 #D86040 #6CD840

split-complementary

#40B8D8 #D8406C #D8AC40

monochromatic

#1B6D83 #2597B6 #40B8D8 #73CBE2 #A6DEED

Accessibility & contrast

On white

2.32

#40B8D8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.07

#40B8D8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B8D8

9.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40B8D8	#FFFFFF	#000000	##000000
##40B8D8	1.00	2.32	9.07	9.07
#FFFFFF	2.32	1.00	21.00	21.00
#000000	9.07	21.00	1.00	1.00
##000000	9.07	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A4B3DA

Deuteranopia (green-blind)

#8FA4D8

Tritanopia (blue-blind)

#00C3C2

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #40b8d8;
/* rgb */ color: rgb(64, 184, 216);
/* oklch */ color: oklch(73.0% 0.113 219.3);

Tailwind

colors: {
  custom: {
    50: '#88cde4',
    500: '#40b8d8',
    950: '#000000',
  },
}

SCSS

$custom: #40b8d8;
$custom-light: #88cde4;
$custom-dark: #000000;

JSON

{
  "hex": "#40b8d8",
  "rgb": {
    "r": 64,
    "g": 184,
    "b": 216
  },
  "hsl": {
    "h": 192.632,
    "s": 66.087,
    "l": 54.902
  },
  "oklch": {
    "l": 0.72959,
    "c": 0.11331,
    "h": 219.3
  },
  "luminance": 0.40329
}

Semantic roles & 50–950 ramp

primary

#40B8D8

secondary

#DAA79A

accent

#633FE9

background

#F9FCFD

surface

#F1F9FB

border

#CBD2D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #40B8D8

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

Preview Lab → · Contrast checker → · Palette generator →