#40A3BB#40A3BB

#40A3BB is a light, moderate cyan. Relative luminance 0.309; OKLCH L 66.7% C 0.097 H 216.8°. Best body text is #000000 at 7.17:1 contrast (WCAG AA passes).

Color values

HEX	#40A3BB
RGB	rgb(64, 163, 187)
HSL	hsl(192, 49%, 49%)
HSV	hsv(192, 66%, 73%)
CMYK	cmyk(65.8%, 12.8%, 0%, 26.7%)
CIE-LAB	lab(62.40, -21.11, -20.85)
CIE-LCH	lch(62.40, 29.67, 224.64°)
OKLab	oklab(66.75% -0.0777 -0.058)
OKLCH	oklch(66.75% 0.097 216.8)
XYZ	xyz(24.1775, 30.8696, 51.6883)
Luminance	0.3087 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40A3BB #BB5840

analogous

#40BB96 #40A3BB #4066BB

triadic

#40A3BB #BB40A3 #A3BB40

tetradic

#40A3BB #9640BB #BB5840 #66BB40

square

#40A3BB #9640BB #BB5840 #66BB40

split-complementary

#40A3BB #BB4066 #BB9640

monochromatic

#215460 #307B8D #40A3BB #6CBACD #99CFDC

Accessibility & contrast

On white

2.93

#40A3BB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.17

#40A3BB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40A3BB

7.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40A3BB	#FFFFFF	#000000	##000000
##40A3BB	1.00	2.93	7.17	7.17
#FFFFFF	2.93	1.00	21.00	21.00
#000000	7.17	21.00	1.00	1.00
##000000	7.17	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#939EBC

Deuteranopia (green-blind)

#8191BB

Tritanopia (blue-blind)

#00ACAA

Achromatopsia (no color)

#979797

Design tokens & code

CSS

--color: #40a3bb;
/* rgb */ color: rgb(64, 163, 187);
/* oklch */ color: oklch(66.7% 0.097 216.8);

Tailwind

colors: {
  custom: {
    50: '#83becf',
    500: '#40a3bb',
    950: '#000000',
  },
}

SCSS

$custom: #40a3bb;
$custom-light: #83becf;
$custom-dark: #000000;

JSON

{
  "hex": "#40a3bb",
  "rgb": {
    "r": 64,
    "g": 163,
    "b": 187
  },
  "hsl": {
    "h": 191.707,
    "s": 49.004,
    "l": 49.216
  },
  "oklch": {
    "l": 0.66745,
    "c": 0.09696,
    "h": 216.8
  },
  "luminance": 0.30872
}

Semantic roles & 50–950 ramp

primary

#40A3BB

secondary

#C89A8F

accent

#6A4FD9

background

#F8FBFC

surface

#F0F6F9

border

#CBD0D2

text

#0C1213

muted

#7D8182

Preview Lab

Preview with #40A3BB

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

Preview Lab → · Contrast checker → · Palette generator →