#40B9DD#40B9DD

#40B9DD is a light, moderate cyan. Relative luminance 0.410; OKLCH L 73.4% C 0.116 H 221.8°. Best body text is #000000 at 9.20:1 contrast (WCAG AA passes).

Color values

HEX	#40B9DD
RGB	rgb(64, 185, 221)
HSL	hsl(194, 70%, 56%)
HSV	hsv(194, 71%, 87%)
CMYK	cmyk(71%, 16.3%, 0%, 13.3%)
CIE-LAB	lab(70.18, -21.79, -27.73)
CIE-LCH	lch(70.18, 35.26, 231.83°)
OKLab	oklab(73.4% -0.0867 -0.0775)
OKLCH	oklch(73.4% 0.116 221.8)
XYZ	xyz(32.5091, 41.0046, 74.5939)
Luminance	0.4101 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40B9DD #DD6440

analogous

#40DDB2 #40B9DD #406ADD

triadic

#40B9DD #DD40B9 #B9DD40

tetradic

#40B9DD #B240DD #DD6440 #6ADD40

square

#40B9DD #B240DD #DD6440 #6ADD40

split-complementary

#40B9DD #DD406A #DDB240

monochromatic

#19708A #229ABE #40B9DD #74CCE6 #A8DFEF

Accessibility & contrast

On white

2.28

#40B9DD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.20

#40B9DD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B9DD

9.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40B9DD	#FFFFFF	#000000	##000000
##40B9DD	1.00	2.28	9.20	9.20
#FFFFFF	2.28	1.00	21.00	21.00
#000000	9.20	21.00	1.00	1.00
##000000	9.20	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A4B4DF

Deuteranopia (green-blind)

#8EA5DD

Tritanopia (blue-blind)

#00C4C5

Achromatopsia (no color)

#ACACAC

Design tokens & code

CSS

--color: #40b9dd;
/* rgb */ color: rgb(64, 185, 221);
/* oklch */ color: oklch(73.4% 0.116 221.8);

Tailwind

colors: {
  custom: {
    50: '#89cee7',
    500: '#40b9dd',
    950: '#000000',
  },
}

SCSS

$custom: #40b9dd;
$custom-light: #89cee7;
$custom-dark: #000000;

JSON

{
  "hex": "#40b9dd",
  "rgb": {
    "r": 64,
    "g": 185,
    "b": 221
  },
  "hsl": {
    "h": 193.758,
    "s": 69.778,
    "l": 55.882
  },
  "oklch": {
    "l": 0.73404,
    "c": 0.11631,
    "h": 221.8
  },
  "luminance": 0.41008
}

Semantic roles & 50–950 ramp

primary

#40B9DD

secondary

#DDAB9C

accent

#643BED

background

#F9FCFE

surface

#F1F9FC

border

#CBD2D5

text

#0D1316

muted

#7E8284

Preview Lab

Preview with #40B9DD

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

Preview Lab → · Contrast checker → · Palette generator →