#40B0CB#40B0CB

#40B0CB is a light, moderate cyan. Relative luminance 0.365; OKLCH L 70.5% C 0.106 H 217.0°. Best body text is #000000 at 8.29:1 contrast (WCAG AA passes).

Color values

HEX	#40B0CB
RGB	rgb(64, 176, 203)
HSL	hsl(192, 57%, 52%)
HSV	hsv(192, 68%, 80%)
CMYK	cmyk(68.5%, 13.3%, 0%, 20.4%)
CIE-LAB	lab(66.86, -22.84, -22.93)
CIE-LCH	lch(66.86, 32.36, 225.12°)
OKLab	oklab(70.52% -0.0847 -0.0639)
OKLCH	oklch(70.52% 0.106 217)
XYZ	xyz(28.4147, 36.4493, 62.0262)
Luminance	0.3645 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40B0CB #CB5B40

analogous

#40CBA1 #40B0CB #406ACB

triadic

#40B0CB #CB40B0 #B0CB40

tetradic

#40B0CB #A140CB #CB5B40 #6ACB40

square

#40B0CB #A140CB #CB5B40 #6ACB40

split-complementary

#40B0CB #CB406A #CBA140

monochromatic

#1F6272 #2C8BA2 #40B0CB #70C4D8 #A0D8E5

Accessibility & contrast

On white

2.53

#40B0CB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.29

#40B0CB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B0CB

8.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40B0CB	#FFFFFF	#000000	##000000
##40B0CB	1.00	2.53	8.29	8.29
#FFFFFF	2.53	1.00	21.00	21.00
#000000	8.29	21.00	1.00	1.00
##000000	8.29	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9EABCD

Deuteranopia (green-blind)

#8B9CCB

Tritanopia (blue-blind)

#00BAB8

Achromatopsia (no color)

#A3A3A3

Design tokens & code

CSS

--color: #40b0cb;
/* rgb */ color: rgb(64, 176, 203);
/* oklch */ color: oklch(70.5% 0.106 217.0);

Tailwind

colors: {
  custom: {
    50: '#86c7da',
    500: '#40b0cb',
    950: '#000000',
  },
}

SCSS

$custom: #40b0cb;
$custom-light: #86c7da;
$custom-dark: #000000;

JSON

{
  "hex": "#40b0cb",
  "rgb": {
    "r": 64,
    "g": 176,
    "b": 203
  },
  "hsl": {
    "h": 191.655,
    "s": 57.202,
    "l": 52.353
  },
  "oklch": {
    "l": 0.70523,
    "c": 0.10611,
    "h": 217
  },
  "luminance": 0.36452
}

Semantic roles & 50–950 ramp

primary

#40B0CB

secondary

#D2A195

accent

#6547E0

background

#F8FCFD

surface

#F0F8FA

border

#CBD1D3

text

#0C1315

muted

#7D8283

Preview Lab

Preview with #40B0CB

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

Preview Lab → · Contrast checker → · Palette generator →