Specify lowercase or uppercase for hex colors.
a { color: #fff }
/** ↑
* This hex color */
The fix
option can automatically fix all of the problems reported by this rule.
string
: "lower"|"upper"
The following patterns are considered problems:
a { color: #FFF; }
The following patterns are not considered problems:
a { color: #000; }
a { color: #fff; }
The following patterns are considered problems:
a { color: #fff; }
The following patterns are not considered problems:
a { color: #000; }
a { color: #FFF; }