#40C5E7#40C5E7

#40C5E7 is a light, vivid cyan. Relative luminance 0.468; OKLCH L 76.6% C 0.121 H 218.8°. Best body text is #000000 at 10.36:1 contrast (WCAG AA passes).

Color values

HEX	#40C5E7
RGB	rgb(64, 197, 231)
HSL	hsl(192, 78%, 58%)
HSV	hsv(192, 72%, 91%)
CMYK	cmyk(72.3%, 14.7%, 0%, 9.4%)
CIE-LAB	lab(74.05, -24.74, -27.21)
CIE-LCH	lch(74.05, 36.77, 227.72°)
OKLab	oklab(76.64% -0.0945 -0.076)
OKLCH	oklch(76.64% 0.121 218.8)
XYZ	xyz(36.4984, 46.7877, 82.6932)
Luminance	0.4679 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40C5E7 #E76240

analogous

#40E7B6 #40C5E7 #4071E7

triadic

#40C5E7 #E740C5 #C5E740

tetradic

#40C5E7 #B640E7 #E76240 #71E740

square

#40C5E7 #B640E7 #E76240 #71E740

split-complementary

#40C5E7 #E74071 #E7B640

monochromatic

#137E99 #1AABD0 #40C5E7 #76D6EE #ADE6F5

Accessibility & contrast

On white

2.03

#40C5E7 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.36

#40C5E7 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40C5E7

10.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40C5E7	#FFFFFF	#000000	##000000
##40C5E7	1.00	2.03	10.36	10.36
#FFFFFF	2.03	1.00	21.00	21.00
#000000	10.36	21.00	1.00	1.00
##000000	10.36	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B0C0E9

Deuteranopia (green-blind)

#99AFE7

Tritanopia (blue-blind)

#00D0D0

Achromatopsia (no color)

#B6B6B6

Design tokens & code

CSS

--color: #40c5e7;
/* rgb */ color: rgb(64, 197, 231);
/* oklch */ color: oklch(76.6% 0.121 218.8);

Tailwind

colors: {
  custom: {
    50: '#8bd6ee',
    500: '#40c5e7',
    950: '#000000',
  },
}

SCSS

$custom: #40c5e7;
$custom-light: #8bd6ee;
$custom-dark: #000000;

JSON

{
  "hex": "#40c5e7",
  "rgb": {
    "r": 64,
    "g": 197,
    "b": 231
  },
  "hsl": {
    "h": 192.216,
    "s": 77.674,
    "l": 57.843
  },
  "oklch": {
    "l": 0.76637,
    "c": 0.1213,
    "h": 218.8
  },
  "luminance": 0.46792
}

Semantic roles & 50–950 ramp

primary

#40C5E7

secondary

#E3AEA0

accent

#5B34F4

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #40C5E7

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

Preview Lab → · Contrast checker → · Palette generator →