The HP Latex 360 incorporates a color measurement instrument from XRite, called an i1 device into the printer hardware. Unfortunately, the type of measurement geometry used in the i1 device (called 0-45 degree) is incompatible with window perf material, due to the fact that the light will pass through the holes of the media, causing inaccurate readings. The type of measurement device that would be needed to take valid readings from this media is called a spherical spectrophotometer.
What most people do out of necessity with perf is to use a 'canned' media profile and bump up the saturation (curves) of the colors, either in the file or the RIP, which increases the amount of ink that ends up going down on the perf. It is an inexact science, but as it is not possible to take valid readings without a spherical measurement device, it is the only reasonable approach to get closer to the desired result when printing onto window perf media.