I Have Auburn Hair

I have natural auburn hair (some ombre highlights at the bottom tips), a part of me wants to dye it completely a differently colour but as I have been told so many times how unique my hair colour apparently is, I have always been reluctant to dye it completely. I dyed my hair completely once, but only with non-permanent dye (no bleach) so it faded eventually.
If anyone here has natural auburn hair, may I ask if the colour eventually goes back to auburn again if you dye it black or dark brown with non-permanent dye? 🤔