Previously coloured my sisters hair purple wella 55/65, she wanted it bright so done full head foils using blondor and pastel then applied the tint! Colour has really faded now she wants to be red (Rihanna red) I know very cliched so my question is... Should I do another full head foils? And what should I use for the red? Needing answers ASAP as doing it later today! Thanks in advance guys xx