Thank you so much for your help! Much appriciated!
You’ve made the route a lot easier, as I will no longer insist on component. It seems I will get the same results with S-video.
I still have the problem with the footage being B/W though. I’ve searched the topic, and many suggestions led me to believe it might just be a flaky cable, but I tried it with two different cables (including the high quality one I used when transfering my Hi8-footage) with the same results.
My theory is that that my VCR might not be able to output S-VIDEO signals correctly. I will probably try to rent or buy another VCR with TBC and S-video natively.
Just to clearify, my setup is like this; Hitachi FX860E VCR -> Scart/S-Video adapter -> S-Video cable -> Decklink Studio S-VIDEO IN.
Again, thanks for your help!