Default Picture

Recently i was working on default pictures or some people say ghost image for a Mobile application. I tried different variations of icons, flat colour, doodles etc. Somehow i was not satisfied with it, at many times generic grey profile picture looks boring and dull.
So finally i design these abstract patterns in combination of first initial of the name to make it personal which looks interesting and the same time it creates a colour, personality and vibrancy.

Let me know what you think?