#40B9D5#40B9D5

#40B9D5 is a light, moderate cyan. Relative luminance 0.406; OKLCH L 73.1% C 0.112 H 216.5°. Best body text is #000000 at 9.12:1 contrast (WCAG AA passes).

Color values

HEX	#40B9D5
RGB	rgb(64, 185, 213)
HSL	hsl(191, 64%, 54%)
HSV	hsv(191, 70%, 84%)
CMYK	cmyk(70%, 13.1%, 0%, 16.5%)
CIE-LAB	lab(69.89, -24.30, -23.80)
CIE-LCH	lch(69.89, 34.02, 224.41°)
OKLab	oklab(73.07% -0.0898 -0.0663)
OKLCH	oklch(73.07% 0.112 216.5)
XYZ	xyz(31.4685, 40.5884, 69.1138)
Luminance	0.4059 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40B9D5 #D55C40

analogous

#40D5A6 #40B9D5 #406FD5

triadic

#40B9D5 #D540B9 #B9D540

tetradic

#40B9D5 #A640D5 #D55C40 #6FD540

square

#40B9D5 #A640D5 #D55C40 #6FD540

split-complementary

#40B9D5 #D5406F #D5A640

monochromatic

#1C6C7F #2797B1 #40B9D5 #72CBE0 #A4DEEB

Accessibility & contrast

On white

2.30

#40B9D5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.12

#40B9D5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B9D5

9.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40B9D5	#FFFFFF	#000000	##000000
##40B9D5	1.00	2.30	9.12	9.12
#FFFFFF	2.30	1.00	21.00	21.00
#000000	9.12	21.00	1.00	1.00
##000000	9.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A6B3D7

Deuteranopia (green-blind)

#91A4D5

Tritanopia (blue-blind)

#00C3C2

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #40b9d5;
/* rgb */ color: rgb(64, 185, 213);
/* oklch */ color: oklch(73.1% 0.112 216.5);

Tailwind

colors: {
  custom: {
    50: '#88cee2',
    500: '#40b9d5',
    950: '#000000',
  },
}

SCSS

$custom: #40b9d5;
$custom-light: #88cee2;
$custom-dark: #000000;

JSON

{
  "hex": "#40b9d5",
  "rgb": {
    "r": 64,
    "g": 185,
    "b": 213
  },
  "hsl": {
    "h": 191.275,
    "s": 63.948,
    "l": 54.314
  },
  "oklch": {
    "l": 0.73073,
    "c": 0.11165,
    "h": 216.5
  },
  "luminance": 0.40592
}

Semantic roles & 50–950 ramp

primary

#40B9D5

secondary

#D8A599

accent

#6041E7

background

#F9FCFD

surface

#F1F9FB

border

#CBD2D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #40B9D5

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

Preview Lab → · Contrast checker → · Palette generator →