#66C237#66C237

#66C237 is a light, vivid yellow-green. Relative luminance 0.417; OKLCH L 73.0% C 0.194 H 137.1°. Best body text is #000000 at 9.34:1 contrast (WCAG AA passes).

Color values

HEX	#66C237
RGB	rgb(102, 194, 55)
HSL	hsl(100, 56%, 49%)
HSV	hsv(100, 72%, 76%)
CMYK	cmyk(47.4%, 0%, 71.6%, 23.9%)
CIE-LAB	lab(70.65, -51.19, 58.22)
CIE-LCH	lch(70.65, 77.52, 131.32°)
OKLab	oklab(72.99% -0.1419 0.1316)
OKLCH	oklch(72.99% 0.194 137.1)
XYZ	xyz(25.4601, 41.6825, 10.3176)
Luminance	0.4168 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C237 #9337C2

analogous

#ACC237 #66C237 #37C24E

triadic

#66C237 #3766C2 #C23766

tetradic

#66C237 #37ACC2 #9337C2 #C24E37

square

#66C237 #37ACC2 #9337C2 #C24E37

split-complementary

#66C237 #4E37C2 #C237AC

monochromatic

#34631C #4D9229 #66C237 #89D363 #ADE093

Accessibility & contrast

On white

2.25

#66C237 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.34

#66C237 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C237

9.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C237	#FFFFFF	#000000	##000000
##66C237	1.00	2.25	9.34	9.34
#FFFFFF	2.25	1.00	21.00	21.00
#000000	9.34	21.00	1.00	1.00
##000000	9.34	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C8B21F

Deuteranopia (green-blind)

#BCAA44

Tritanopia (blue-blind)

#61BBA7

Achromatopsia (no color)

#ADADAD

Design tokens & code

CSS

--color: #66c237;
/* rgb */ color: rgb(102, 194, 55);
/* oklch */ color: oklch(73.0% 0.194 137.1);

Tailwind

colors: {
  custom: {
    50: '#99d576',
    500: '#66c237',
    950: '#000000',
  },
}

SCSS

$custom: #66c237;
$custom-light: #99d576;
$custom-dark: #000000;

JSON

{
  "hex": "#66c237",
  "rgb": {
    "r": 102,
    "g": 194,
    "b": 55
  },
  "hsl": {
    "h": 99.712,
    "s": 55.823,
    "l": 48.824
  },
  "oklch": {
    "l": 0.72992,
    "c": 0.19352,
    "h": 137.1
  },
  "luminance": 0.41684
}

Semantic roles & 50–950 ramp

primary

#66C237

secondary

#B589CB

accent

#49DFAC

background

#F9FDF7

surface

#F2FAED

border

#CCD3C8

text

#0F1409

muted

#7E837B

Preview Lab

Preview with #66C237

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

Preview Lab → · Contrast checker → · Palette generator →