#66AC28#66AC28

#66AC28 is a light, vivid yellow-green. Relative luminance 0.325; OKLCH L 67.3% C 0.175 H 133.9°. Best body text is #000000 at 7.50:1 contrast (WCAG AA passes).

Color values

HEX	#66AC28
RGB	rgb(102, 172, 40)
HSL	hsl(92, 62%, 42%)
HSV	hsv(92, 77%, 67%)
CMYK	cmyk(40.7%, 0%, 76.7%, 32.5%)
CIE-LAB	lab(63.74, -43.29, 56.64)
CIE-LCH	lch(63.74, 71.29, 127.39°)
OKLab	oklab(67.29% -0.1216 0.1262)
OKLCH	oklch(67.29% 0.175 133.9)
XYZ	xyz(20.6146, 32.4820, 7.1905)
Luminance	0.3248 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66AC28 #6E28AC

analogous

#A8AC28 #66AC28 #28AC2C

triadic

#66AC28 #2866AC #AC2866

tetradic

#66AC28 #28A8AC #6E28AC #AC2C28

square

#66AC28 #28A8AC #6E28AC #AC2C28

split-complementary

#66AC28 #2C28AC #AC28A8

monochromatic

#2B4911 #497A1C #66AC28 #84D23F #A4DE71

Accessibility & contrast

On white

2.80

#66AC28 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.50

#66AC28 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66AC28

7.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66AC28	#FFFFFF	#000000	##000000
##66AC28	1.00	2.80	7.50	7.50
#FFFFFF	2.80	1.00	21.00	21.00
#000000	7.50	21.00	1.00	1.00
##000000	7.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B39E06

Deuteranopia (green-blind)

#A99836

Tritanopia (blue-blind)

#65A593

Achromatopsia (no color)

#9A9A9A

Design tokens & code

CSS

--color: #66ac28;
/* rgb */ color: rgb(102, 172, 40);
/* oklch */ color: oklch(67.3% 0.175 133.9);

Tailwind

colors: {
  custom: {
    50: '#98c56c',
    500: '#66ac28',
    950: '#000000',
  },
}

SCSS

$custom: #66ac28;
$custom-light: #98c56c;
$custom-dark: #000000;

JSON

{
  "hex": "#66ac28",
  "rgb": {
    "r": 102,
    "g": 172,
    "b": 40
  },
  "hsl": {
    "h": 91.818,
    "s": 62.264,
    "l": 41.569
  },
  "oklch": {
    "l": 0.67292,
    "c": 0.17519,
    "h": 133.9
  },
  "luminance": 0.32483
}

Semantic roles & 50–950 ramp

primary

#66AC28

secondary

#9B6BC5

accent

#42E599

background

#F9FCF6

surface

#F2F8EC

border

#CCD1C7

text

#0E1307

muted

#7E827A

Preview Lab

Preview with #66AC28

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

Preview Lab → · Contrast checker → · Palette generator →