What is the color palette that you used. When importing the sprites and tiles, the colors do not match the png file.
Viewing post in RPG 8x8 Tileset and sprites comments
I made this a LONG time ago, but I believe it was the Default TIC80 color pallet. I have since went back and removed the 'black', but that is a separate file.
I just downloaded the file and brought it into Aseprite, and all of the colors seem to be correct on my end. What program are you using to view the file?