I have just reached Master and my handle became yellow :D, the next rank I should be aiming for now is International Master but unfortunately unlike Candidate Master and Master, it doesn't reward you with a color change to distinguish you from Masters and reward you on your effort which makes it useless. Since red is hard too so now I have to increase my rating by 300 points to receive a new color change which would take months :(.
That's why I'm making a petition to change the International Master color (to a slightly darker shade of orange for example?).