Yes, to be clear, I always appreciate all the works from you and other designers/customizers here put into amazing free themes in the website. Just I thought the recoloring task is somewhat a sub/secondary task in theme customizing, so customizers probably want to spend their time in creating their new theme rather than recoloring (if it took that much time)). But they did release many recoloring themes, so I thought probably they must use some really fast method (at least they released recoloring versions of themes faster than actual new themes). Just some curious thoughts anyway, thanks for answer.