Changes

[httphttps://www.mediafiregithub.com/downloadlibretro/common-shaders/blob/master/1ed1ucdir7mah7tcgp/Gameboy+Colorsgameboy-colors.cg Gameboy Colorscgp gameboy-colors.cgcgp]

A .cg cgp shader preset can be loaded in [[OpenEMU]] or [[RetroArch]] that is meant to (sort-of) replicate the "Gameboy Colors" option in VBA-Musing the image-adjustment Cg shader. The settings are parameters that are stored in the cgp and can be modified by opening up the file in something like Notepad++adjusted at runtime. The relevant parameters set for this effect are:

saturation Target Gamma = 02.5;4

gamma Monitor Gamma = 02.9;16

luminance Saturation = 0.5 Luminance = 0.9; The colors will not be exactly the same as what VBA-M produces (a bit brighter and no washed out blacks) but it will get you the desaturation effect. Can be adjusted to fit your tastes, and you can get the washed out blacks by increasing "Brightness Boost" and decreasing Luminance a bit.