like that head,I don't know how to change the spell's color.Is that possible to change the spell's color ?

Yeah, of course. It can be different for every spell, so you have to just look at the configs of whatever spell you want to change. If it's using redstone or mob_spell particles, there's usually a color parameter somewhere.

If it's using other particles then you can't change the color of those, but you can change what particle it uses, or change it to redstone/mob_spell and set a color.

Thank you 👍