I think you'd better add SE's graphics as a dependency, then tint the icon of the items ( https://lua-api.factorio.com/latest/types/IconData.html )
SE's license doesn't allow using the files directly.

That's probably a better idea, i thought about using the graphics mod but i didn't want to force everyone to download a ~20mb mod when I'm only using 2 of the textures.

what SE art did you use?

Just the pyroflux icon, and the holmium powder icon but tinted red because I couldn't figure out for the life of me how to make a new fluid texture, or a powder one. I didn't want the crushed promethium to look like recolored nutrients so i had to find a different texture.