With regard to coolant colors. This is very tricky as currently there is no "standard" color coding system. There are colors that you can "associate" with different types of fluids, but one cannot be 100% sure that green fluid=type X fluid. This document
shows the "color codes" for coolants, but also states caution as wear, manufacturer, and mixing of coolants can create color variations which add to the confusion. Also since there is currently no standard, a green coolant from Manufacturer "A" can be identical to a orange coolant from Manufacturer "B". When in doubt, do a full system flush and replace with one type/brand of coolant or choose a coolant with multiple compatibilty.