You may want to hold off for a bit. Rugrats Movie has very recently been regraded/remastered for Paramount+, and that’s likely going to be the same transfer used for the upcoming Blu-ray that’s only a couple of months away from release as of this writing. All three theatrical installments are included, and I know for sure that Paris has also received a new grade. I wish I could provide a screenshot comparison between the first film’s Amazon HD stream and the new one, but when I went to play it on Paramount+, it wasn’t available. Perhaps to up preorders for the new physical release? Not sure, but I would wait until you get ahold of it before doing any major color regrading— it may not even be necessary. I did sample a few minutes of the first film’s remaster, and lemme tell ya, it does look great.