#40B8D4#40B8D4

#40B8D4 is a light, moderate cyan. Relative luminance 0.401; OKLCH L 72.8% C 0.111 H 216.6°. Best body text is #000000 at 9.02:1 contrast (WCAG AA passes).

Color values

HEX	#40B8D4
RGB	rgb(64, 184, 212)
HSL	hsl(191, 63%, 54%)
HSV	hsv(191, 70%, 83%)
CMYK	cmyk(69.8%, 13.2%, 0%, 16.9%)
CIE-LAB	lab(69.56, -24.11, -23.76)
CIE-LCH	lch(69.56, 33.85, 224.59°)
OKLab	oklab(72.8% -0.0892 -0.0662)
OKLCH	oklch(72.8% 0.111 216.6)
XYZ	xyz(31.1335, 40.1209, 68.3779)
Luminance	0.4012 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40B8D4 #D45C40

analogous

#40D4A6 #40B8D4 #406ED4

triadic

#40B8D4 #D440B8 #B8D440

tetradic

#40B8D4 #A640D4 #D45C40 #6ED440

square

#40B8D4 #A640D4 #D45C40 #6ED440

split-complementary

#40B8D4 #D4406E #D4A640

monochromatic

#1C6B7D #2796AF #40B8D4 #72CBDF #A4DDEA

Accessibility & contrast

On white

2.33

#40B8D4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.02

#40B8D4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B8D4

9.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40B8D4	#FFFFFF	#000000	##000000
##40B8D4	1.00	2.33	9.02	9.02
#FFFFFF	2.33	1.00	21.00	21.00
#000000	9.02	21.00	1.00	1.00
##000000	9.02	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A5B3D6

Deuteranopia (green-blind)

#91A3D4

Tritanopia (blue-blind)

#00C2C1

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #40b8d4;
/* rgb */ color: rgb(64, 184, 212);
/* oklch */ color: oklch(72.8% 0.111 216.6);

Tailwind

colors: {
  custom: {
    50: '#88cde1',
    500: '#40b8d4',
    950: '#000000',
  },
}

SCSS

$custom: #40b8d4;
$custom-light: #88cde1;
$custom-dark: #000000;

JSON

{
  "hex": "#40b8d4",
  "rgb": {
    "r": 64,
    "g": 184,
    "b": 212
  },
  "hsl": {
    "h": 191.351,
    "s": 63.248,
    "l": 54.118
  },
  "oklch": {
    "l": 0.72795,
    "c": 0.1111,
    "h": 216.6
  },
  "luminance": 0.40124
}

Semantic roles & 50–950 ramp

primary

#40B8D4

secondary

#D7A498

accent

#6142E6

background

#F9FCFD

surface

#F1F9FB

border

#CBD2D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #40B8D4

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

Preview Lab → · Contrast checker → · Palette generator →