Board Thread:General Discussion/@comment-26996244-20161223154622/@comment-34307760-20180112065449

MettatonFabulous wrote: But seriously,there are proofs for all,let me show:

White/gray:In the game his slippers look like this.

Pink:His action figure,his plush and the Colored Sprite Mod.

Blue:His Tarot Card.

And also he may use sneakers because of his Steam Card.

Well,i believe he uses pink slippers because there are more evidences. However, you also need to consider the quality of the evidence. The white/gray color has the most effective evidence since it comes from the actual source itself: the game.

The merchandise is known to be noncanon, and Toby even talks about it here: https://twitter.com/tobyfox/status/802147835244400640?lang=en Additionally, the Colored Sprite Mod is fanmade, so it is clearly not canon. Therefore, the evidence for the pink color is of low quality and is most likely incorrect.j

Sans' tarot card is also merchandise, so it falls under the same umbrella as above.

Conclusion: The evidence best supports that Sans' slippers are white/gray.