It depends on where you buy the layout.
Dozens of companies sell pre dyed poker felt by the yard.
Takes roughly 3 yards for a hold-em table.
Different rolls of cloth can be different shades due to die lots.

The new type long lasting felts like the Palms use come in rolls of white cloth. Each order is custom made with a process called color sublimation. (Bet I did not spell that right )
The edges we fold under and staple is still white.