#66B040#66B040

#66B040 is a light, vivid yellow-green. Relative luminance 0.342; OKLCH L 68.5% C 0.164 H 136.6°. Best body text is #000000 at 7.85:1 contrast (WCAG AA passes).

Color values

HEX	#66B040
RGB	rgb(102, 176, 64)
HSL	hsl(100, 47%, 47%)
HSV	hsv(100, 64%, 69%)
CMYK	cmyk(42%, 0%, 63.6%, 31%)
CIE-LAB	lab(65.16, -43.14, 48.78)
CIE-LCH	lch(65.16, 65.13, 131.49°)
OKLab	oklab(68.51% -0.1194 0.1129)
OKLCH	oklch(68.51% 0.164 136.6)
XYZ	xyz(21.9296, 34.2444, 10.3038)
Luminance	0.3425 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B040 #8A40B0

analogous

#9EB040 #66B040 #40B052

triadic

#66B040 #4066B0 #B04066

tetradic

#66B040 #409EB0 #8A40B0 #B05240

square

#66B040 #409EB0 #8A40B0 #B05240

split-complementary

#66B040 #5240B0 #B0409E

monochromatic

#32561F #4C8330 #66B040 #87C766 #AAD893

Accessibility & contrast

On white

2.68

#66B040 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.85

#66B040 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B040

7.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B040	#FFFFFF	#000000	##000000
##66B040	1.00	2.68	7.85	7.85
#FFFFFF	2.68	1.00	21.00	21.00
#000000	7.85	21.00	1.00	1.00
##000000	7.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B6A233

Deuteranopia (green-blind)

#AC9C49

Tritanopia (blue-blind)

#63AA99

Achromatopsia (no color)

#9E9E9E

Design tokens & code

CSS

--color: #66b040;
/* rgb */ color: rgb(102, 176, 64);
/* oklch */ color: oklch(68.5% 0.164 136.6);

Tailwind

colors: {
  custom: {
    50: '#97c87a',
    500: '#66b040',
    950: '#000000',
  },
}

SCSS

$custom: #66b040;
$custom-light: #97c87a;
$custom-dark: #000000;

JSON

{
  "hex": "#66b040",
  "rgb": {
    "r": 102,
    "g": 176,
    "b": 64
  },
  "hsl": {
    "h": 99.643,
    "s": 46.667,
    "l": 47.059
  },
  "oklch": {
    "l": 0.68508,
    "c": 0.16435,
    "h": 136.6
  },
  "luminance": 0.34246
}

Semantic roles & 50–950 ramp

primary

#66B040

secondary

#AF89C3

accent

#51D6A9

background

#F9FCF7

surface

#F2F8EE

border

#CCD1C9

text

#0E1309

muted

#7E827B

Preview Lab

Preview with #66B040

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

Preview Lab → · Contrast checker → · Palette generator →