#40B9D3#40B9D3

#40B9D3 is a light, moderate cyan. Relative luminance 0.405; OKLCH L 73.0% C 0.111 H 215.1°. Best body text is #000000 at 9.10:1 contrast (WCAG AA passes).

Color values

HEX	#40B9D3
RGB	rgb(64, 185, 211)
HSL	hsl(191, 63%, 54%)
HSV	hsv(191, 70%, 83%)
CMYK	cmyk(69.7%, 12.3%, 0%, 17.3%)
CIE-LAB	lab(69.82, -24.92, -22.82)
CIE-LCH	lch(69.82, 33.79, 222.47°)
OKLab	oklab(72.99% -0.0906 -0.0635)
OKLCH	oklch(72.99% 0.111 215.1)
XYZ	xyz(31.2162, 40.4875, 67.7851)
Luminance	0.4049 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40B9D3 #D35A40

analogous

#40D3A4 #40B9D3 #4070D3

triadic

#40B9D3 #D340B9 #B9D340

tetradic

#40B9D3 #A440D3 #D35A40 #70D340

square

#40B9D3 #A440D3 #D35A40 #70D340

split-complementary

#40B9D3 #D34070 #D3A440

monochromatic

#1D6B7C #2896AE #40B9D3 #72CBDE #A3DDEA

Accessibility & contrast

On white

2.31

#40B9D3 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.10

#40B9D3 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B9D3

9.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40B9D3	#FFFFFF	#000000	##000000
##40B9D3	1.00	2.31	9.10	9.10
#FFFFFF	2.31	1.00	21.00	21.00
#000000	9.10	21.00	1.00	1.00
##000000	9.10	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A7B3D4

Deuteranopia (green-blind)

#92A4D3

Tritanopia (blue-blind)

#00C3C1

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #40b9d3;
/* rgb */ color: rgb(64, 185, 211);
/* oklch */ color: oklch(73.0% 0.111 215.1);

Tailwind

colors: {
  custom: {
    50: '#88cee0',
    500: '#40b9d3',
    950: '#000000',
  },
}

SCSS

$custom: #40b9d3;
$custom-light: #88cee0;
$custom-dark: #000000;

JSON

{
  "hex": "#40b9d3",
  "rgb": {
    "r": 64,
    "g": 185,
    "b": 211
  },
  "hsl": {
    "h": 190.612,
    "s": 62.553,
    "l": 53.922
  },
  "oklch": {
    "l": 0.72992,
    "c": 0.11066,
    "h": 215.1
  },
  "luminance": 0.40491
}

Semantic roles & 50–950 ramp

primary

#40B9D3

secondary

#D7A398

accent

#5F42E6

background

#F9FCFD

surface

#F1F9FB

border

#CBD2D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #40B9D3

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

Preview Lab → · Contrast checker → · Palette generator →