Berberis atro nana, a purple foliage dwarf shrub, fuschia genii with yellow foliage, grasses like elymus magellanicus with lovely blue foliage. Carex buchanii erect red foliage and stipa Tennuissima with billowing fluffy flowers throughout summer. Lavendars, hellebores with colour now and in spring with evergreen foliage. Heucheras Berry Smoothy, marmalade, citronella and Obsidian. Geraniums like Jolly Bee, Elke and Ann folkard. Aster frikartii monch for blue flowers from mid summer to autumn and rudbekia Goldsturn for contrast. A couple of euphorbias....rubra for purple evergreen foliage and Polychroma for chrome yellow spring flowers. I grow a lovely eryngium called Jade Frost with variegated foliage and the most fantastic blue coloured flowers. Try a couple of taller grasses like miscanthus gold bar and morning light for narrow swaying height. A slow growing easy conifer like Taxus Standishii will give height in a colour ranging from yellow to,olive during the year. A couple of rhymes like Silver Posie,