I'm needing help.

As much as I love my platinum hair, my hair grows too fast for it so instead of touch ups every 4-5 weeks I need it every 3 weeks. I need to go darker (just in time for fall) but I still want to be funky and not brunette. Something that won't show my roots off as badly. So many colors and inspirations are going through my head and since my hair is bleached already it's perfect to do any coloring on the tips like pink or lilac or whatever. I just don't want to go all the way black if at all possible....
I'd love to hear your ideas.