#66B529#66B529

#66B529 is a light, vivid yellow-green. Relative luminance 0.360; OKLCH L 69.6% C 0.186 H 135.0°. Best body text is #000000 at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#66B529
RGB	rgb(102, 181, 41)
HSL	hsl(94, 63%, 44%)
HSV	hsv(94, 77%, 71%)
CMYK	cmyk(43.6%, 0%, 77.3%, 29%)
CIE-LAB	lab(66.54, -46.93, 59.00)
CIE-LCH	lch(66.54, 75.39, 128.50°)
OKLab	oklab(69.59% -0.1313 0.1312)
OKLCH	oklch(69.59% 0.186 135)
XYZ	xyz(22.4031, 36.0313, 7.8717)
Luminance	0.3603 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B529 #7829B5

analogous

#ACB529 #66B529 #29B532

triadic

#66B529 #2966B5 #B52966

tetradic

#66B529 #29ACB5 #7829B5 #B53229

square

#66B529 #29ACB5 #7829B5 #B53229

split-complementary

#66B529 #3229B5 #B529AC

monochromatic

#2E5112 #4A831E #66B529 #84D546 #A5E078

Accessibility & contrast

On white

2.56

#66B529 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.21

#66B529 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B529

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B529	#FFFFFF	#000000	##000000
##66B529	1.00	2.56	8.21	8.21
#FFFFFF	2.56	1.00	21.00	21.00
#000000	8.21	21.00	1.00	1.00
##000000	8.21	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BCA602

Deuteranopia (green-blind)

#B19F38

Tritanopia (blue-blind)

#64AE9B

Achromatopsia (no color)

#A2A2A2

Design tokens & code

CSS

--color: #66b529;
/* rgb */ color: rgb(102, 181, 41);
/* oklch */ color: oklch(69.6% 0.186 135.0);

Tailwind

colors: {
  custom: {
    50: '#98cc6e',
    500: '#66b529',
    950: '#000000',
  },
}

SCSS

$custom: #66b529;
$custom-light: #98cc6e;
$custom-dark: #000000;

JSON

{
  "hex": "#66b529",
  "rgb": {
    "r": 102,
    "g": 181,
    "b": 41
  },
  "hsl": {
    "h": 93.857,
    "s": 63.063,
    "l": 43.529
  },
  "oklch": {
    "l": 0.69593,
    "c": 0.18566,
    "h": 135
  },
  "luminance": 0.36033
}

Semantic roles & 50–950 ramp

primary

#66B529

secondary

#A272C8

accent

#42E69E

background

#F9FCF7

surface

#F2F9ED

border

#CCD2C8

text

#0E1308

muted

#7E827B

Preview Lab

Preview with #66B529

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

Preview Lab → · Contrast checker → · Palette generator →