Require or disallow alpha channel for hex colors.
a { color: #fffa }
/** ↑
* This alpha channel */The message secondary option can accept the arguments of this rule.
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; }