Color/Shift Edit point cloud RGB values?

I need to be able to select a point cloud object and shift the points’ RGB color, brighten, saturate, or add value contrast. In other words, do blanket color edits to the RGB value of each point, perhaps by individual channels as well.
I am assuming this is something Grasshopper might be able to do… if not, anyone know of another plugin/tool that could accomplish this?
Many thanks!

Not easy in Grasshopper, it actually doesn’t understand point-clouds at all. You’ll need either a plugin or some code to convert a point cloud into lists of points and colours, and then another to put those values back into a point cloud.