Color code map by a measure (grouping)

[drew61199]

My map consists of locations of facilities and the count of repair orders for those facilities (electrical, plumbing, HVAC, etc). The bubble size is controlled by the count of repair orders and that works as desired, but since there are LOTS of locations nationally and all bubbles are the same color, the "hot spots" get lost in the shuffle (it was not desired to identify repair types with different colors as there are also a lot of different repair types, so it was far too busy). Using a heat map doesn't convey the visual correctly as there will only be 2-3 hot spots nationally and as you drill down, it will dynamically adjust, but it's less than ideal. 

The client wants different colors based on "grouping" of the repair order counts. For example, if a facility has 0-5 tickets, then green, 6-10 yellow, 11+ red. I cannot find anything in the standard map that offers this, so is it possible via an expression / measure or are there other 3rd party maps that offer this functionality?

[Rohit001]

Can you share the demo file or data