Thoughts about Digital Color Mixing

Quite a random tuto, filled with many thoughts as stated in the title. Someone raised a question in the Forum, about the mixing in Photoshop/Gimp compared to the mixing in SAI. It made me think about many things I had never thought of until now. Like is the digital mixing an additive mixing or a subtractive mixing ? Can you easily predict the result of a given mix ? What primaries should you use to mix your digital colours ? Seriously, artists, don't do scientific studies. Your brain will end as damaged as mine and you'll start to analyse and make silly theories and calculations about nearly everything ! So basically, that was part of my personnal color theory. I've thought about so much things I didn't know how to include, I'm not even sure the way I've organized it is understandable by someone other than me

There's also a French translation : Thoughts about Digital Color Mixing (French ver.)