First, please let me apologize to Bonfim and Alex for taking so long to reply.
Bonfim I could not for the life of me find my original reference, it must be floating in cyber-space somewhere.
Alex, first I have to qualify that Marvin's eyes would be spinning in his head regarding the color below, also I am notoriously awful at photographing my paintings and then making them worse by tweaking in photoshop.
After studying with Liberace (Rob) for awhile, it is the reason I did this exercise. It wasn't to reproduce the colors of Rembrandt but those on Rob's palette.
This may sound really yuck to a lot of artist here, but it's actually very lovely once you get a handle on the colors.
For transitional Rob uses (these apply to my copy); Cad yellow light, Alizarin Crimson, Flake white and here's the kicker...Phthalo green or blue. I have found the green is blue enough to cover both. Adjust with the flake for the value needed.
For the darks, no white in these areas - it is Cad yellow light, a rose red (he uses a permanent rose that I couldn't handle) right now I am using a Pyrao rose from Cennin (I am sorry, I know I spelled that wrong but the tube split so I had to re tube it and didn't write down the name, hopefully someone can correct me.) and a Cobalt turquoise light. You really need to at least mix some up and see what you get before comment!
I should add the base or what Rob hates to be referred to as "Local Color" is a mixture of the Cad yellow light, rose and flake.
Mischa, thank you for your thoughts, I'll keep an eye on the values.
Here are two examples incorporating these colors, I hope I don't have the color too off in the images. I am without photoshop right now so I'll try to get these to work.