there is a plant that's gray w/fuzz on it. can't remember the name. (Lambs ear??) no flowers, just the gray leaves. that w/the red NZ flax (the taller spikier one) would look great.
Red Coleus! (these do great in shady spots)
pink Cordyline:
throw in some Bacopa for trailing
then just find a pot that compliments the colors. maybe a glazed ceramic pot in a black or dark green/gray color?
Q