Red it surely is!
I always come back to the bright red after experimenting with other hues. Max Factor's Glossfinity really lasts several days (not exactly 7 days as it promises though). Essie's Gelsetter is a must as a top coat - makes a wonderful glossy finish that also lasts several days.
Max Factor's pure red is #85 Cerise.
Do you have your favourite shade of nail polish?