What you're after is not really called bilinear interpolation. Bilinear implies two arguments I and j and blends four colors using those two i,j values.
As suggested in your code, every color may be represented as a vector in Euclidean 3 space.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.