By turning the "else if" into an "if" you introduce a silent bug when Color.yellow is added, since the final else clause would now have to deal with both blue a

By turning the "else if" into an "if" you introduce a silent bug when Color.yellow is added, since the final else clause would now have to deal with both blue and yellow correctly. Adding a new member to the Color enum should break code that isn't written to handle it: which is any code written before Color.yellow was introduced.