What's the best colorful perenial plant to have in a sun fulled garden

location is needed for the answer

Lilies

try: daylilies, Echinacea (cone flowers), daisies, field poppies

http://www.clemson.edu/extension/hgic/plants/landscape/flowers/hgic1153.html

Some plants I have in my all afternoon sun garden (100+ in the Summer) ~ Daylily, Marigold, Catmint, Shasta Daisy, Liatris, Red Hot Poker, Iris, Lantana, Bee Balm, Sedum, Love-lies-bleeding, Cosmos, Rosemary, Alyssum, Roses, Geraniums, Statice, Yarrow, Snow in Summer, Lambs Ear, Coreopsis, Sunflowers, Lavender, Catnip, Gaura, Buddleia, Chives, Society garlic , hollyhock, calendula, asparagus fern, African Daisy, Lemon Verbena, Cranesbill, Blue Potato Bush, Mallow, Rose of Sharon, Pittosporum...just to name a few ♥ Have fun! BTW, I'm in zone 9