#40A3BF#40A3BF

#40A3BF is a light, moderate cyan. Relative luminance 0.310; OKLCH L 66.9% C 0.099 H 219.9°. Best body text is #000000 at 7.21:1 contrast (WCAG AA passes).

Color values

HEX	#40A3BF
RGB	rgb(64, 163, 191)
HSL	hsl(193, 50%, 50%)
HSV	hsv(193, 66%, 75%)
CMYK	cmyk(66.5%, 14.7%, 0%, 25.1%)
CIE-LAB	lab(62.54, -19.86, -22.86)
CIE-LCH	lch(62.54, 30.29, 229.02°)
OKLab	oklab(66.91% -0.0761 -0.0637)
OKLCH	oklch(66.91% 0.099 219.9)
XYZ	xyz(24.6117, 31.0433, 53.9750)
Luminance	0.3105 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40A3BF #BF5C40

analogous

#40BF9B #40A3BF #4064BF

triadic

#40A3BF #BF40A3 #A3BF40

tetradic

#40A3BF #9B40BF #BF5C40 #64BF40

square

#40A3BF #9B40BF #BF5C40 #64BF40

split-complementary

#40A3BF #BF4064 #BF9B40

monochromatic

#215563 #317C91 #40A3BF #6EB9CE #9CCFDE

Accessibility & contrast

On white

2.91

#40A3BF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.21

#40A3BF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40A3BF

7.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40A3BF	#FFFFFF	#000000	##000000
##40A3BF	1.00	2.91	7.21	7.21
#FFFFFF	2.91	1.00	21.00	21.00
#000000	7.21	21.00	1.00	1.00
##000000	7.21	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#929FC1

Deuteranopia (green-blind)

#8092BF

Tritanopia (blue-blind)

#00ACAC

Achromatopsia (no color)

#979797

Design tokens & code

CSS

--color: #40a3bf;
/* rgb */ color: rgb(64, 163, 191);
/* oklch */ color: oklch(66.9% 0.099 219.9);

Tailwind

colors: {
  custom: {
    50: '#83bed2',
    500: '#40a3bf',
    950: '#000000',
  },
}

SCSS

$custom: #40a3bf;
$custom-light: #83bed2;
$custom-dark: #000000;

JSON

{
  "hex": "#40a3bf",
  "rgb": {
    "r": 64,
    "g": 163,
    "b": 191
  },
  "hsl": {
    "h": 193.228,
    "s": 49.804,
    "l": 50
  },
  "oklch": {
    "l": 0.66911,
    "c": 0.09927,
    "h": 219.9
  },
  "luminance": 0.31046
}

Semantic roles & 50–950 ramp

primary

#40A3BF

secondary

#CA9D91

accent

#6D4ED9

background

#F8FBFC

surface

#F0F6F9

border

#CBD0D2

text

#0C1214

muted

#7D8182

Preview Lab

Preview with #40A3BF

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

Preview Lab → · Contrast checker → · Palette generator →