cuz they like to look weird
Very simple--umpires wear blue uniforms.
According to the official MLB rules, section 9, umpires are required to wear a uniform, but it does not describe what the uniform is. It is safe to assume that they all have to appear in the same clothing (hence uniform), and it cannot be deceptively similar to one of the teams' uniforms.
sometimes they wear black wind breaker shirts or black suit coats, but the blue is tradtionally the colour and they are even called 'blue' by managers and players
Umpires
Blue is a popular color of uniform an umpire might wear, though not at all levels or every game.
There are usually 3 umpires in cricket
Urban Umpires was created in 2006.
how black umpires are there the 2013 season
Yes, they have several. Such as, Chair Umpires and Line Umpires.
Two mounted umpires, and another on the sidelines.
World Umpires Association was created in 2000.
In case of Cricket, ICC(international cricket council) pays the umpires