Most of the time my MDP2P is neon-green. One time it came out almost clear with a hint of yellow. Never blue though. I have never done wacker rxn, only oxone! Washing my impure ketone right after hydrolysis with sat NaHCO3, 3x, lead to distillation of the ketone with VERY LITTLE TAR (less than 1 gram), and light yellow ketone. This was the best Ketone swim ever made. (smelled the best too!)