#66BD21#66BD21

#66BD21 is a light, vivid yellow-green. Relative luminance 0.393; OKLCH L 71.6% C 0.199 H 135.3°. Best body text is #000000 at 8.87:1 contrast (WCAG AA passes).

Color values

HEX	#66BD21
RGB	rgb(102, 189, 33)
HSL	hsl(93, 70%, 44%)
HSV	hsv(93, 83%, 74%)
CMYK	cmyk(46%, 0%, 82.5%, 25.9%)
CIE-LAB	lab(68.99, -50.52, 63.58)
CIE-LCH	lch(68.99, 81.21, 128.47°)
OKLab	oklab(71.59% -0.1414 0.1397)
OKLCH	oklch(71.59% 0.199 135.3)
XYZ	xyz(23.9510, 39.3283, 7.7676)
Luminance	0.3933 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BD21 #7821BD

analogous

#B4BD21 #66BD21 #21BD2A

triadic

#66BD21 #2166BD #BD2166

tetradic

#66BD21 #21B4BD #7821BD #BD2A21

square

#66BD21 #21B4BD #7821BD #BD2A21

split-complementary

#66BD21 #2A21BD #BD21B4

monochromatic

#2E550F #4A8918 #66BD21 #84DD3E #A5E672

Accessibility & contrast

On white

2.37

#66BD21 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.87

#66BD21 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BD21

8.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BD21	#FFFFFF	#000000	##000000
##66BD21	1.00	2.37	8.87	8.87
#FFFFFF	2.37	1.00	21.00	21.00
#000000	8.87	21.00	1.00	1.00
##000000	8.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C4AD00

Deuteranopia (green-blind)

#B9A635

Tritanopia (blue-blind)

#63B6A1

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #66bd21;
/* rgb */ color: rgb(102, 189, 33);
/* oklch */ color: oklch(71.6% 0.199 135.3);

Tailwind

colors: {
  custom: {
    50: '#9ad16c',
    500: '#66bd21',
    950: '#000000',
  },
}

SCSS

$custom: #66bd21;
$custom-light: #9ad16c;
$custom-dark: #000000;

JSON

{
  "hex": "#66bd21",
  "rgb": {
    "r": 102,
    "g": 189,
    "b": 33
  },
  "hsl": {
    "h": 93.462,
    "s": 70.27,
    "l": 43.529
  },
  "oklch": {
    "l": 0.71588,
    "c": 0.19876,
    "h": 135.3
  },
  "luminance": 0.3933
}

Semantic roles & 50–950 ramp

primary

#66BD21

secondary

#A26DCD

accent

#3BED9E

background

#FAFCF6

surface

#F3F9EC

border

#CDD2C7

text

#0F1408

muted

#7F827A

Preview Lab

Preview with #66BD21

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

Preview Lab → · Contrast checker → · Palette generator →