#66A528#66A528

#66A528 is a light, vivid yellow-green. Relative luminance 0.299; OKLCH L 65.5% C 0.166 H 133.0°. Best body text is #000000 at 6.98:1 contrast (WCAG AA passes).

Color values

HEX	#66A528
RGB	rgb(102, 165, 40)
HSL	hsl(90, 61%, 40%)
HSV	hsv(90, 76%, 65%)
CMYK	cmyk(38.2%, 0%, 75.8%, 35.3%)
CIE-LAB	lab(61.56, -40.33, 54.53)
CIE-LCH	lch(61.56, 67.82, 126.48°)
OKLab	oklab(65.51% -0.1135 0.1217)
OKLCH	oklch(65.51% 0.166 133)
XYZ	xyz(19.3173, 29.8874, 6.7581)
Luminance	0.2989 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66A528 #6728A5

analogous

#A5A528 #66A528 #28A528

triadic

#66A528 #2866A5 #A52866

tetradic

#66A528 #28A5A5 #6728A5 #A52828

square

#66A528 #28A5A5 #6728A5 #A52828

split-complementary

#66A528 #2828A5 #A528A5

monochromatic

#294210 #48741C #66A528 #85CF3B #A3DB6C

Accessibility & contrast

On white

3.01

#66A528 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.98

#66A528 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #66A528

6.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66A528	#FFFFFF	#000000	##000000
##66A528	1.00	3.01	6.98	6.98
#FFFFFF	3.01	1.00	21.00	21.00
#000000	6.98	21.00	1.00	1.00
##000000	6.98	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AC980C

Deuteranopia (green-blind)

#A39335

Tritanopia (blue-blind)

#669E8D

Achromatopsia (no color)

#959595

Design tokens & code

CSS

--color: #66a528;
/* rgb */ color: rgb(102, 165, 40);
/* oklch */ color: oklch(65.5% 0.166 133.0);

Tailwind

colors: {
  custom: {
    50: '#97c06b',
    500: '#66a528',
    950: '#000000',
  },
}

SCSS

$custom: #66a528;
$custom-light: #97c06b;
$custom-dark: #000000;

JSON

{
  "hex": "#66a528",
  "rgb": {
    "r": 102,
    "g": 165,
    "b": 40
  },
  "hsl": {
    "h": 90.24,
    "s": 60.976,
    "l": 40.196
  },
  "oklch": {
    "l": 0.65507,
    "c": 0.16648,
    "h": 133
  },
  "luminance": 0.29888
}

Semantic roles & 50–950 ramp

primary

#66A528

secondary

#9567C2

accent

#44E495

background

#F9FBF6

surface

#F2F7EC

border

#CCD0C7

text

#0E1207

muted

#7E817A

Preview Lab

Preview with #66A528

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

Preview Lab → · Contrast checker → · Palette generator →