#66B321#66B321

#66B321 is a light, vivid yellow-green. Relative luminance 0.352; OKLCH L 69.0% C 0.187 H 134.3°. Best body text is #000000 at 8.04:1 contrast (WCAG AA passes).

Color values

HEX	#66B321
RGB	rgb(102, 179, 33)
HSL	hsl(92, 69%, 42%)
HSV	hsv(92, 82%, 70%)
CMYK	cmyk(43%, 0%, 81.6%, 29.8%)
CIE-LAB	lab(65.88, -46.54, 60.77)
CIE-LCH	lch(65.88, 76.55, 127.45°)
OKLab	oklab(69.04% -0.1307 0.1338)
OKLCH	oklch(69.04% 0.187 134.3)
XYZ	xyz(21.8737, 35.1736, 7.0752)
Luminance	0.3518 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B321 #6E21B3

analogous

#AFB321 #66B321 #21B325

triadic

#66B321 #2166B3 #B32166

tetradic

#66B321 #21AFB3 #6E21B3 #B32521

square

#66B321 #21AFB3 #6E21B3 #B32521

split-complementary

#66B321 #2521B3 #B321AF

monochromatic

#2B4C0E #497F17 #66B321 #84DA37 #A4E46B

Accessibility & contrast

On white

2.61

#66B321 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.04

#66B321 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B321

8.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B321	#FFFFFF	#000000	##000000
##66B321	1.00	2.61	8.04	8.04
#FFFFFF	2.61	1.00	21.00	21.00
#000000	8.04	21.00	1.00	1.00
##000000	8.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BAA400

Deuteranopia (green-blind)

#B09E33

Tritanopia (blue-blind)

#65AC99

Achromatopsia (no color)

#A0A0A0

Design tokens & code

CSS

--color: #66b321;
/* rgb */ color: rgb(102, 179, 33);
/* oklch */ color: oklch(69.0% 0.187 134.3);

Tailwind

colors: {
  custom: {
    50: '#99ca6a',
    500: '#66b321',
    950: '#000000',
  },
}

SCSS

$custom: #66b321;
$custom-light: #99ca6a;
$custom-dark: #000000;

JSON

{
  "hex": "#66b321",
  "rgb": {
    "r": 102,
    "g": 179,
    "b": 33
  },
  "hsl": {
    "h": 91.644,
    "s": 68.868,
    "l": 41.569
  },
  "oklch": {
    "l": 0.69039,
    "c": 0.18705,
    "h": 134.3
  },
  "luminance": 0.35175
}

Semantic roles & 50–950 ramp

primary

#66B321

secondary

#9B66CA

accent

#3CEC99

background

#F9FCF6

surface

#F2F8EC

border

#CCD1C7

text

#0F1307

muted

#7E827A

Preview Lab

Preview with #66B321

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

Preview Lab → · Contrast checker → · Palette generator →