This is quite a can of worms, and I’m not sure you want to open it. You can read some detailed advice in the following 2002 paper if you really want to know:
Ward, Greg, Elena Eydelberg-Vileshin,
“Picture Perfect RGB Rendering Using Spectral Prefiltering and Sharp Color Primaries,”
Thirteenth Eurographics Workshop on Rendering (2002),
P. Debevec and S. Gibson (Editors), June 2002.