#40B9D8#40B9D8

#40B9D8 is a light, moderate cyan. Relative luminance 0.407; OKLCH L 73.2% C 0.113 H 218.5°. Best body text is #000000 at 9.15:1 contrast (WCAG AA passes).

Color values

HEX	#40B9D8
RGB	rgb(64, 185, 216)
HSL	hsl(192, 66%, 55%)
HSV	hsv(192, 70%, 85%)
CMYK	cmyk(70.4%, 14.4%, 0%, 15.3%)
CIE-LAB	lab(69.99, -23.37, -25.28)
CIE-LCH	lch(69.99, 34.42, 227.25°)
OKLab	oklab(73.2% -0.0886 -0.0705)
OKLCH	oklch(73.2% 0.113 218.5)
XYZ	xyz(31.8528, 40.7421, 71.1377)
Luminance	0.4075 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40B9D8 #D85F40

analogous

#40D8AB #40B9D8 #406DD8

triadic

#40B9D8 #D840B9 #B9D840

tetradic

#40B9D8 #AB40D8 #D85F40 #6DD840

square

#40B9D8 #AB40D8 #D85F40 #6DD840

split-complementary

#40B9D8 #D8406D #D8AB40

monochromatic

#1B6E83 #2598B6 #40B9D8 #73CCE2 #A6DEED

Accessibility & contrast

On white

2.30

#40B9D8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.15

#40B9D8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B9D8

9.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40B9D8	#FFFFFF	#000000	##000000
##40B9D8	1.00	2.30	9.15	9.15
#FFFFFF	2.30	1.00	21.00	21.00
#000000	9.15	21.00	1.00	1.00
##000000	9.15	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A5B4DA

Deuteranopia (green-blind)

#90A4D8

Tritanopia (blue-blind)

#00C4C3

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #40b9d8;
/* rgb */ color: rgb(64, 185, 216);
/* oklch */ color: oklch(73.2% 0.113 218.5);

Tailwind

colors: {
  custom: {
    50: '#88cee4',
    500: '#40b9d8',
    950: '#000000',
  },
}

SCSS

$custom: #40b9d8;
$custom-light: #88cee4;
$custom-dark: #000000;

JSON

{
  "hex": "#40b9d8",
  "rgb": {
    "r": 64,
    "g": 185,
    "b": 216
  },
  "hsl": {
    "h": 192.237,
    "s": 66.087,
    "l": 54.902
  },
  "oklch": {
    "l": 0.73196,
    "c": 0.11328,
    "h": 218.5
  },
  "luminance": 0.40746
}

Semantic roles & 50–950 ramp

primary

#40B9D8

secondary

#DAA79A

accent

#613FE9

background

#F9FCFD

surface

#F1F9FB

border

#CBD2D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #40B9D8

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

Preview Lab → · Contrast checker → · Palette generator →