#66CE2F#66CE2F

#66CE2F is a light, highly saturated yellow-green. Relative luminance 0.472; OKLCH L 76.0% C 0.212 H 137.4°. Best body text is #000000 at 10.43:1 contrast (WCAG AA passes).

Color values

HEX	#66CE2F
RGB	rgb(102, 206, 47)
HSL	hsl(99, 63%, 50%)
HSV	hsv(99, 77%, 81%)
CMYK	cmyk(50.5%, 0%, 77.2%, 19.2%)
CIE-LAB	lab(74.30, -56.28, 64.52)
CIE-LCH	lch(74.30, 85.61, 131.10°)
OKLab	oklab(75.98% -0.1561 0.1437)
OKLCH	oklch(75.98% 0.212 137.4)
XYZ	xyz(28.0630, 47.1706, 10.3148)
Luminance	0.4717 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66CE2F #972FCE

analogous

#B6CE2F #66CE2F #2FCE47

triadic

#66CE2F #2F66CE #CE2F66

tetradic

#66CE2F #2FB6CE #972FCE #CE472F

square

#66CE2F #2FB6CE #972FCE #CE472F

split-complementary

#66CE2F #472FCE #CE2FB6

monochromatic

#356A18 #4D9C24 #66CE2F #8ADB60 #AFE691

Accessibility & contrast

On white

2.01

#66CE2F on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.43

#66CE2F on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66CE2F

10.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66CE2F	#FFFFFF	#000000	##000000
##66CE2F	1.00	2.01	10.43	10.43
#FFFFFF	2.01	1.00	21.00	21.00
#000000	10.43	21.00	1.00	1.00
##000000	10.43	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D5BC00

Deuteranopia (green-blind)

#C7B441

Tritanopia (blue-blind)

#5FC7B0

Achromatopsia (no color)

#B7B7B7

Design tokens & code

CSS

--color: #66ce2f;
/* rgb */ color: rgb(102, 206, 47);
/* oklch */ color: oklch(76.0% 0.212 137.4);

Tailwind

colors: {
  custom: {
    50: '#9bde74',
    500: '#66ce2f',
    950: '#000000',
  },
}

SCSS

$custom: #66ce2f;
$custom-light: #9bde74;
$custom-dark: #000000;

JSON

{
  "hex": "#66ce2f",
  "rgb": {
    "r": 102,
    "g": 206,
    "b": 47
  },
  "hsl": {
    "h": 99.245,
    "s": 62.846,
    "l": 49.608
  },
  "oklch": {
    "l": 0.75976,
    "c": 0.21213,
    "h": 137.4
  },
  "luminance": 0.47173
}

Semantic roles & 50–950 ramp

primary

#66CE2F

secondary

#B888D1

accent

#42E6AD

background

#FAFDF7

surface

#F4FBED

border

#CED4C8

text

#0F1509

muted

#7F837B

Preview Lab

Preview with #66CE2F

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

Preview Lab → · Contrast checker → · Palette generator →