Is it the color shifting filament, or coextruded type? I’ve used coextruded red-yellow-blue that looks really great when the prints were done. The three blend as they melt, so you get a rainbow effect of red, orange, yellow, green, blue and purple that shifts as you turn the finished piece. Anyway, for a short length of filament like you have, try doing a standard test print like a benchy or any small figure. Even if you end up short of filament to finish, you’ll have an idea of how the filament will look if you end up buying a roll.