There was this Snow White cartoon tv show which I watched in the us 2003-2006 (may have been reruns) The details I remember apart from the regular 7 dwarves, Prince Charming, magic mirror and evil stepmother.
There's an episode where the dwarves use 7 ribbons in the forest to make some kind of magic barrier that prevents the magic mirror from detecting Snow White. Then in a later episode one of the ribbons gets cut and the Queen starts chasing her again
Snow White and Charming go to this alternate reality place. A rainbow marks the place where they entered. There's a scene where the two of them see rainbow in different places because they entered that realm in different places.
Also the Queen transforms into a dragon or something like that... let's just say Charming fights a dragon.