#40B5D8#40B5D8

#40B5D8 is a light, moderate cyan. Relative luminance 0.391; OKLCH L 72.3% C 0.114 H 221.8°. Best body text is #000000 at 8.82:1 contrast (WCAG AA passes).

Color values

HEX	#40B5D8
RGB	rgb(64, 181, 216)
HSL	hsl(194, 66%, 55%)
HSV	hsv(194, 70%, 85%)
CMYK	cmyk(70.4%, 16.2%, 0%, 15.3%)
CIE-LAB	lab(68.82, -21.32, -27.08)
CIE-LCH	lch(68.82, 34.47, 231.79°)
OKLab	oklab(72.25% -0.0847 -0.0757)
OKLCH	oklch(72.25% 0.114 221.8)
XYZ	xyz(31.0278, 39.0921, 70.8627)
Luminance	0.3910 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40B5D8 #D86340

analogous

#40D8AF #40B5D8 #4069D8

triadic

#40B5D8 #D840B5 #B5D840

tetradic

#40B5D8 #AF40D8 #D86340 #69D840

square

#40B5D8 #AF40D8 #D86340 #69D840

split-complementary

#40B5D8 #D84069 #D8AF40

monochromatic

#1B6B83 #2594B6 #40B5D8 #73C9E2 #A6DCED

Accessibility & contrast

On white

2.38

#40B5D8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.82

#40B5D8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B5D8

8.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40B5D8	#FFFFFF	#000000	##000000
##40B5D8	1.00	2.38	8.82	8.82
#FFFFFF	2.38	1.00	21.00	21.00
#000000	8.82	21.00	1.00	1.00
##000000	8.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A0B1DA

Deuteranopia (green-blind)

#8BA1D8

Tritanopia (blue-blind)

#00C0C0

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #40b5d8;
/* rgb */ color: rgb(64, 181, 216);
/* oklch */ color: oklch(72.3% 0.114 221.8);

Tailwind

colors: {
  custom: {
    50: '#88cbe4',
    500: '#40b5d8',
    950: '#000000',
  },
}

SCSS

$custom: #40b5d8;
$custom-light: #88cbe4;
$custom-dark: #000000;

JSON

{
  "hex": "#40b5d8",
  "rgb": {
    "r": 64,
    "g": 181,
    "b": 216
  },
  "hsl": {
    "h": 193.816,
    "s": 66.087,
    "l": 54.902
  },
  "oklch": {
    "l": 0.72251,
    "c": 0.11359,
    "h": 221.8
  },
  "luminance": 0.39096
}

Semantic roles & 50–950 ramp

primary

#40B5D8

secondary

#DAA99A

accent

#663FE9

background

#F9FCFD

surface

#F1F8FB

border

#CBD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #40B5D8

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

Preview Lab → · Contrast checker → · Palette generator →