Inconsistencies between Material Color Selected (RGB values), "Actual" in GrabCAD software, Build Plate color, and printed color with J750

I'm wondering if there is a software issue with GrabCAD when being used for 3D printing; if you input RGB values to set a color for a part, the little window shows you your selected color. The window below the values and color graph shows you the color that the printer can match closest to. The part on the build plate shows a much different color. It left me wondering which hue the J750 would actually print. The colors that end up printed are nowhere near the "actual" color GrabCAD says it will be, and instead are more like the color that shows up on the build plate view.

Examples: I selected RGB values for a tan color; the "actual" color in GrabCAD shows a similar (and acceptable) tan color that the printer can print given the materials loaded. The color that shows up on the part in the build plate doesn't match what the "actual" window shows. What comes out of the printer is a weird shade of yellow-green. (jpg attached)

This has also happened when I manually selected a shade of faint sky blue, set the alpha value to 0.08; it printed a shade of Kelly green. That shade is what showed up on the part on the build plate view. I thought maybe there might be a display discrepancy, but it does seem to print what shows up on the build plate. (jpg attached) Why is there a huge discrepancy between RGB value and what GrabCAD says it will print, and fails to print?