Next lightest shades from Buff 7W and Bisque 4W?

Hi! I have 2 shades of Teint Miracle because I get spray tans. :) But since it's now cold outside and I won't be outside much, I need to account for that, too. What's the next-lightest shade for Buff 7W and the next lightest shade for Bisque 4W? I have olive undertones; that is, my veins look more green than they do blue. :)

Thanks!