#40B1D9#40B1D9

#40B1D9 is a light, moderate cyan. Relative luminance 0.375; OKLCH L 71.4% C 0.115 H 225.7°. Best body text is #000000 at 8.51:1 contrast (WCAG AA passes).

Color values

HEX	#40B1D9
RGB	rgb(64, 177, 217)
HSL	hsl(196, 67%, 55%)
HSV	hsv(196, 71%, 85%)
CMYK	cmyk(70.5%, 18.4%, 0%, 14.9%)
CIE-LAB	lab(67.68, -18.92, -29.38)
CIE-LCH	lch(67.68, 34.95, 237.22°)
OKLab	oklab(71.35% -0.0804 -0.0823)
OKLCH	oklch(71.35% 0.115 225.7)
XYZ	xyz(30.3558, 37.5406, 71.2784)
Luminance	0.3754 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40B1D9 #D96840

analogous

#40D9B4 #40B1D9 #4065D9

triadic

#40B1D9 #D940B1 #B1D940

tetradic

#40B1D9 #B440D9 #D96840 #65D940

square

#40B1D9 #B440D9 #D96840 #65D940

split-complementary

#40B1D9 #D94065 #D9B440

monochromatic

#1A6984 #2491B7 #40B1D9 #73C6E3 #A6DBED

Accessibility & contrast

On white

2.47

#40B1D9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.51

#40B1D9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B1D9

8.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40B1D9	#FFFFFF	#000000	##000000
##40B1D9	1.00	2.47	8.51	8.51
#FFFFFF	2.47	1.00	21.00	21.00
#000000	8.51	21.00	1.00	1.00
##000000	8.51	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9BADDB

Deuteranopia (green-blind)

#869ED9

Tritanopia (blue-blind)

#00BDBE

Achromatopsia (no color)

#A5A5A5

Design tokens & code

CSS

--color: #40b1d9;
/* rgb */ color: rgb(64, 177, 217);
/* oklch */ color: oklch(71.4% 0.115 225.7);

Tailwind

colors: {
  custom: {
    50: '#88c8e5',
    500: '#40b1d9',
    950: '#000000',
  },
}

SCSS

$custom: #40b1d9;
$custom-light: #88c8e5;
$custom-dark: #000000;

JSON

{
  "hex": "#40b1d9",
  "rgb": {
    "r": 64,
    "g": 177,
    "b": 217
  },
  "hsl": {
    "h": 195.686,
    "s": 66.812,
    "l": 55.098
  },
  "oklch": {
    "l": 0.71352,
    "c": 0.11503,
    "h": 225.7
  },
  "luminance": 0.37544
}

Semantic roles & 50–950 ramp

primary

#40B1D9

secondary

#DAAB9A

accent

#6B3EEA

background

#F9FCFD

surface

#F1F8FB

border

#CBD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #40B1D9

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

Preview Lab → · Contrast checker → · Palette generator →