Yes I had that problem too but it's easily fixed if you change NTSC/ PAL format in options.
I am from Europe so I'm in PAL region and I have Panasonic VCR with NTSC video cassette that is in EP format. Now I usually connect my VCR with a USB cable called "EasyCAP". Usually when I put PAL tapes it transfers it very fine.
But when I put this NTSC EP cassette in which is fine on TV but on computer it's in black and white. It's like when I put PAL cassette and don't set PAL/NTSC region in options so it gets black and white.
So what should I do?