That is not a proper implementation and misleading. If you click white in the color picker you expect it to be white. White is also the normal considered color for Windows 10 systray icons. I dont really know what you mean with that actually "255 255 255 is used as transparent color. Just just any of those values like you did and that will give you the white color.". If you want to use transparent color too for the font, you have to give a 4th alpha channel value. 255 255 255 is white. Just using 254 255 255, 255 254 255 or 255 255 254 as a workaround is nonsense. I doubt most people will come to that workaround.