#40B4E2#40B4E2

#40B4E2 is a light, vivid cyan. Relative luminance 0.392; OKLCH L 72.5% C 0.121 H 228.6°. Best body text is #000000 at 8.84:1 contrast (WCAG AA passes).

Color values

HEX	#40B4E2
RGB	rgb(64, 180, 226)
HSL	hsl(197, 74%, 57%)
HSV	hsv(197, 72%, 89%)
CMYK	cmyk(71.7%, 20.4%, 0%, 11.4%)
CIE-LAB	lab(68.91, -17.59, -32.41)
CIE-LCH	lch(68.91, 36.88, 241.52°)
OKLab	oklab(72.45% -0.0801 -0.0909)
OKLCH	oklch(72.45% 0.121 228.6)
XYZ	xyz(32.1575, 39.2198, 77.8121)
Luminance	0.3922 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40B4E2 #E26E40

analogous

#40E2BF #40B4E2 #4063E2

triadic

#40B4E2 #E240B4 #B4E240

tetradic

#40B4E2 #BF40E2 #E26E40 #63E240

square

#40B4E2 #BF40E2 #E26E40 #63E240

split-complementary

#40B4E2 #E24063 #E2BF40

monochromatic

#166E92 #1E97C7 #40B4E2 #75C9EA #AADEF2

Accessibility & contrast

On white

2.37

#40B4E2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.84

#40B4E2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B4E2

8.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40B4E2	#FFFFFF	#000000	##000000
##40B4E2	1.00	2.37	8.84	8.84
#FFFFFF	2.37	1.00	21.00	21.00
#000000	8.84	21.00	1.00	1.00
##000000	8.84	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9CB1E4

Deuteranopia (green-blind)

#86A1E1

Tritanopia (blue-blind)

#00C1C3

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #40b4e2;
/* rgb */ color: rgb(64, 180, 226);
/* oklch */ color: oklch(72.5% 0.121 228.6);

Tailwind

colors: {
  custom: {
    50: '#89caeb',
    500: '#40b4e2',
    950: '#000000',
  },
}

SCSS

$custom: #40b4e2;
$custom-light: #89caeb;
$custom-dark: #000000;

JSON

{
  "hex": "#40b4e2",
  "rgb": {
    "r": 64,
    "g": 180,
    "b": 226
  },
  "hsl": {
    "h": 197.037,
    "s": 73.636,
    "l": 56.863
  },
  "oklch": {
    "l": 0.72452,
    "c": 0.12115,
    "h": 228.6
  },
  "luminance": 0.39223
}

Semantic roles & 50–950 ramp

primary

#40B4E2

secondary

#E0B19E

accent

#6C38F0

background

#F9FCFE

surface

#F1F8FD

border

#CBD1D5

text

#0D1316

muted

#7E8284

Preview Lab

Preview with #40B4E2

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

Preview Lab → · Contrast checker → · Palette generator →