#66B140#66B140

#66B140 is a light, vivid yellow-green. Relative luminance 0.346; OKLCH L 68.8% C 0.166 H 136.7°. Best body text is #000000 at 7.93:1 contrast (WCAG AA passes).

Color values

HEX	#66B140
RGB	rgb(102, 177, 64)
HSL	hsl(100, 47%, 47%)
HSV	hsv(100, 64%, 69%)
CMYK	cmyk(42.4%, 0%, 63.8%, 30.6%)
CIE-LAB	lab(65.47, -43.56, 49.13)
CIE-LCH	lch(65.47, 65.66, 131.57°)
OKLab	oklab(68.76% -0.1206 0.1136)
OKLCH	oklch(68.76% 0.166 136.7)
XYZ	xyz(22.1264, 34.6380, 10.3694)
Luminance	0.3464 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B140 #8B40B1

analogous

#9FB140 #66B140 #40B153

triadic

#66B140 #4066B1 #B14066

tetradic

#66B140 #409FB1 #8B40B1 #B15340

square

#66B140 #409FB1 #8B40B1 #B15340

split-complementary

#66B140 #5340B1 #B1409F

monochromatic

#32571F #4C8430 #66B140 #87C866 #AAD893

Accessibility & contrast

On white

2.65

#66B140 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.93

#66B140 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B140

7.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B140	#FFFFFF	#000000	##000000
##66B140	1.00	2.65	7.93	7.93
#FFFFFF	2.65	1.00	21.00	21.00
#000000	7.93	21.00	1.00	1.00
##000000	7.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B7A332

Deuteranopia (green-blind)

#AD9D49

Tritanopia (blue-blind)

#63AB99

Achromatopsia (no color)

#9F9F9F

Design tokens & code

CSS

--color: #66b140;
/* rgb */ color: rgb(102, 177, 64);
/* oklch */ color: oklch(68.8% 0.166 136.7);

Tailwind

colors: {
  custom: {
    50: '#97c97a',
    500: '#66b140',
    950: '#000000',
  },
}

SCSS

$custom: #66b140;
$custom-light: #97c97a;
$custom-dark: #000000;

JSON

{
  "hex": "#66b140",
  "rgb": {
    "r": 102,
    "g": 177,
    "b": 64
  },
  "hsl": {
    "h": 99.823,
    "s": 46.888,
    "l": 47.255
  },
  "oklch": {
    "l": 0.68761,
    "c": 0.16567,
    "h": 136.7
  },
  "luminance": 0.34639
}

Semantic roles & 50–950 ramp

primary

#66B140

secondary

#B089C3

accent

#51D7AA

background

#F9FCF7

surface

#F2F8EE

border

#CCD1C9

text

#0E1309

muted

#7E827B

Preview Lab

Preview with #66B140

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

Preview Lab → · Contrast checker → · Palette generator →