Formula to build and fill a color in a cell in excel

Question

I have Red, Green,Blue ,alpha values as columns in an excel sheet. I want to should the color corresponding to these value in the next column. Ex R = 255, G = 0, B = 0 Alpha = 255 ==> Fill cell with RED color.

Answer 1

With an in-built formula it can't be done without using something like VBA as well.