protected function coerceColor($value)
{
switch ($value[0]) {
case Type::T_COLOR:
return $value;
case Type::T_KEYWORD:
$name = strtolower($value[1]);
if (isset(Colors::$cssColors[$name])) {
$rgba = explode(',', Colors::$cssColors[$name]);
return isset($rgba[3]) ? [Type::T_COLOR, (int) $rgba[0], (int) $rgba[1], (int) $rgba[2], (int) $rgba[3]] : [Type::T_COLOR, (int) $rgba[0], (int) $rgba[1], (int) $rgba[2]];
}
return null;
}
return null;
}