#66A623#66A623

#66A623 is a light, vivid yellow-green. Relative luminance 0.302; OKLCH L 65.7% C 0.170 H 132.8°. Best body text is #000000 at 7.04:1 contrast (WCAG AA passes).

Color values

HEX	#66A623
RGB	rgb(102, 166, 35)
HSL	hsl(89, 65%, 39%)
HSV	hsv(89, 79%, 65%)
CMYK	cmyk(38.6%, 0%, 78.9%, 34.9%)
CIE-LAB	lab(61.84, -41.04, 56.45)
CIE-LCH	lch(61.84, 69.79, 126.02°)
OKLab	oklab(65.73% -0.1158 0.125)
OKLCH	oklch(65.73% 0.17 132.8)
XYZ	xyz(19.4188, 30.2177, 6.3992)
Luminance	0.3022 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66A623 #6323A6

analogous

#A6A523 #66A623 #25A623

triadic

#66A623 #2366A6 #A62366

tetradic

#66A623 #23A6A5 #6323A6 #A62325

square

#66A623 #23A6A5 #6323A6 #A62325

split-complementary

#66A623 #2325A6 #A523A6

monochromatic

#28410E #477318 #66A623 #85D432 #A3DF65

Accessibility & contrast

On white

2.98

#66A623 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.04

#66A623 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66A623

7.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66A623	#FFFFFF	#000000	##000000
##66A623	1.00	2.98	7.04	7.04
#FFFFFF	2.98	1.00	21.00	21.00
#000000	7.04	21.00	1.00	1.00
##000000	7.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AD9900

Deuteranopia (green-blind)

#A49431

Tritanopia (blue-blind)

#679F8E

Achromatopsia (no color)

#959595

Design tokens & code

CSS

--color: #66a623;
/* rgb */ color: rgb(102, 166, 35);
/* oklch */ color: oklch(65.7% 0.170 132.8);

Tailwind

colors: {
  custom: {
    50: '#97c169',
    500: '#66a623',
    950: '#000000',
  },
}

SCSS

$custom: #66a623;
$custom-light: #97c169;
$custom-dark: #000000;

JSON

{
  "hex": "#66a623",
  "rgb": {
    "r": 102,
    "g": 166,
    "b": 35
  },
  "hsl": {
    "h": 89.313,
    "s": 65.174,
    "l": 39.412
  },
  "oklch": {
    "l": 0.65731,
    "c": 0.1704,
    "h": 132.8
  },
  "luminance": 0.30219
}

Semantic roles & 50–950 ramp

primary

#66A623

secondary

#9161C4

accent

#40E892

background

#F9FBF6

surface

#F2F7EB

border

#CCD0C6

text

#0E1207

muted

#7E817A

Preview Lab

Preview with #66A623

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

Preview Lab → · Contrast checker → · Palette generator →