#66B731#66B731

#66B731 is a light, vivid yellow-green. Relative luminance 0.369; OKLCH L 70.2% C 0.184 H 135.8°. Best body text is #000000 at 8.38:1 contrast (WCAG AA passes).

Color values

HEX#66B731
RGBrgb(102, 183, 49)
HSLhsl(96, 58%, 45%)
HSVhsv(96, 73%, 72%)
CMYKcmyk(44.3%, 0%, 73.2%, 28.2%)
CIE-LABlab(67.21, -47.24, 56.93)
CIE-LCHlch(67.21, 73.98, 129.69°)
OKLaboklab(70.16% -0.1316 0.1281)
OKLCHoklch(70.16% 0.184 135.8)
XYZxyz(22.9668, 36.9121, 8.8197)
Luminance0.3691 (WCAG relative)
Temperaturewarm
Familyyellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66B731 #8231B7
analogous
#A9B731 #66B731 #31B73F
triadic
#66B731 #3166B7 #B73166
tetradic
#66B731 #31A9B7 #8231B7 #B73F31
square
#66B731 #31A9B7 #8231B7 #B73F31
split-complementary
#66B731 #3F31B7 #B731A9
monochromatic
#305617 #4B8724 #66B731 #86D154 #A8DE84

Accessibility & contrast

On white

2.51
#66B731 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

8.38
#66B731 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B731
8.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66B731#FFFFFF#000000##000000
##66B7311.002.518.388.38
#FFFFFF2.511.0021.0021.00
#0000008.3821.001.001.00
##0000008.3821.001.001.00

Color blindness preview

Protanopia (red-blind)
#BEA818
Deuteranopia (green-blind)
#B3A13E
Tritanopia (blue-blind)
#63B09D
Achromatopsia (no color)
#A4A4A4

Design tokens & code

CSS
--color: #66b731;
/* rgb */ color: rgb(102, 183, 49);
/* oklch */ color: oklch(70.2% 0.184 135.8);
Tailwind
colors: {
  custom: {
    50: '#98cd72',
    500: '#66b731',
    950: '#000000',
  },
}
SCSS
$custom: #66b731;
$custom-light: #98cd72;
$custom-dark: #000000;
JSON
{
  "hex": "#66b731",
  "rgb": {
    "r": 102,
    "g": 183,
    "b": 49
  },
  "hsl": {
    "h": 96.269,
    "s": 57.759,
    "l": 45.49
  },
  "oklch": {
    "l": 0.70155,
    "c": 0.18365,
    "h": 135.8
  },
  "luminance": 0.36914
}

Semantic roles & 50–950 ramp

primary
#66B731
secondary
#AA7CC8
accent
#47E1A4
background
#F9FCF7
surface
#F2F9ED
border
#CCD2C8
text
#0E1308
muted
#7E827B

Preview Lab

Preview with #66B731

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

Preview Lab → · Contrast checker → · Palette generator →

#66B731 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva