Pretty sure Aseprite uses 8 bit.
"Aseprite is a sprite editor that features animation, pixel art drawing and editing, and exporting into gamedev-friendly formats. Aseprite is a large, feature-rich program that offers many excellent features for making 8 bit sprites, including layers, sprite previews, and preset palettes. Aseprite costs $10, and there is a free trial version."
Any other way I can double check this?
Thanks again everyone.