How to play safe holi , its totally depends on ur nature.
Some people want it silently, and just wish to everyone.
Some want to enjoy and play colours.
Its very good, if you want to with colours.
Its shows you are a person who has colourful life, but most importantly you playing colour without to hurt anyone and without annoying anyone.
Its only my suggestion is , enjoy the festival without hurting anyone.
Wish you all a very happy holi.
Regards : Shilpa