Lots of old sVHS-c, sVHS and Digital 8 tapes were already converted by a professional to digital DV tapes that I imported into iMovie, mostly for colour corrections and assembling. Because of their age, there remain - of course - a lot of degrading colour artifacts: yellow, orange, pink, purple, and also sudden black frames among otherwise normal images on more recent tapes. iMovie obviously can not cope with this, but will the 'Intuitive Colour Grading' tools of FCPX do the job thanks to its Content Auto-Analysis in 'Balance Color', or to 'Match Color' and the 'Color Board'? Or DaVinci Risolve Lite? Especially of the black frames I have to get rid of, so I hope all frames can be restored to the correct colour values of the other images.