The different colours used on the occasion of Holi is nothing but split seven basic colours of a single colour of Sun Rays.Each colour does not reach to its destination till all the colours do not unify together.Ourselves including the entire things of the universe are just like split colours ,need to meet with each other to reach at its destination.Probably this is tried,manually , in the festival Holi.....lol......
Wish a very very happy and colourful Holi to everybody.