Require or disallow alpha channel for hex colors.
a { color: #fffa }
/** ↑
* This alpha channel */
string
: "always"|"never"
The following patterns are considered problems:
a { color: #fff; }
a { color: #ffffff; }
The following patterns are not considered problems:
a { color: #fffa; }
a { color: #ffffffaa; }
The following patterns are considered problems:
a { color: #fffa; }
a { color: #ffffffaa; }
The following patterns are not considered problems:
a { color: #fff; }
a { color: #ffffff; }