#40FF00#40FF00

#40FF00 is a very light, highly saturated green. Relative luminance 0.726; OKLCH L 87.2% C 0.287 H 141.0°. Best body text is #000000 at 15.52:1 contrast (WCAG AA passes).

Color values

HEX	#40FF00
RGB	rgb(64, 255, 0)
HSL	hsl(105, 100%, 50%)
HSV	hsv(105, 100%, 100%)
CMYK	cmyk(74.9%, 0%, 100%, 0%)
CIE-LAB	lab(88.26, -81.46, 83.82)
CIE-LCH	lch(88.26, 116.88, 134.18°)
OKLab	oklab(87.23% -0.2228 0.1806)
OKLCH	oklch(87.23% 0.287 141)
XYZ	xyz(37.8723, 72.6056, 12.0183)
Luminance	0.7261 (WCAG relative)
Temperature	warm
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40FF00 #BF00FF

analogous

#C0FF00 #40FF00 #00FF3F

triadic

#40FF00 #0040FF #FF0040

tetradic

#40FF00 #00C0FF #BF00FF #FF3F00

square

#40FF00 #00C0FF #BF00FF #FF3F00

split-complementary

#40FF00 #3F00FF #FF00C0

monochromatic

#218500 #31C200 #40FF00 #6EFF3D #9CFF7A

Accessibility & contrast

On white

1.35

#40FF00 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

15.52

#40FF00 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40FF00

15.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40FF00	#FFFFFF	#000000	##000000
##40FF00	1.00	1.35	15.52	15.52
#FFFFFF	1.35	1.00	21.00	21.00
#000000	15.52	21.00	1.00	1.00
##000000	15.52	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE600

Deuteranopia (green-blind)

#F1D83A

Tritanopia (blue-blind)

#00F7D9

Achromatopsia (no color)

#DDDDDD

Design tokens & code

CSS

--color: #40ff00;
/* rgb */ color: rgb(64, 255, 0);
/* oklch */ color: oklch(87.2% 0.287 141.0);

Tailwind

colors: {
  custom: {
    50: '#94ff70',
    500: '#40ff00',
    950: '#000000',
  },
}

SCSS

$custom: #40ff00;
$custom-light: #94ff70;
$custom-dark: #000000;

JSON

{
  "hex": "#40ff00",
  "rgb": {
    "r": 64,
    "g": 255,
    "b": 0
  },
  "hsl": {
    "h": 104.941,
    "s": 100,
    "l": 50
  },
  "oklch": {
    "l": 0.87234,
    "c": 0.28678,
    "h": 141
  },
  "luminance": 0.7261
}

Semantic roles & 50–950 ramp

primary

#40FF00

secondary

#6E188B

accent

#29FFC9

background

#FCFFFB

surface

#F6FFF1

border

#D0D7CB

text

#101809

muted

#80867D

Preview Lab

Preview with #40FF00

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

Preview Lab → · Contrast checker → · Palette generator →