For a formal brown-and-blue themed wedding, silver anniversary party or bridal shower, choose white flowers such as lilies on long stems. Mix a variety of white blooms, such as roses, hydrangeas and baby's breath, or keep the look austere by limiting arrangements to one variety only. Potted kalinchoe with tiny white blooms on dark green foliage make a sweet centerpiece that is low growing, allowing guests to see one another over the arrangement. Put them in light blue or brown pots to meld the flowers into the scheme.
Hot tropical shades like bright red, golden yellow, sunny orange and vibrant pink pop against a sky blue and earth brown backdrop. Gerbera daisies in these shades convey a youthful, bright appeal; wildflowers such as poppies and mustard feel casual and breezy in earthenware vases. Add brownish stones to the bottoms of clear vases to anchor stems and unify the color scheme. Use royal blue ceramics for a Mexican feel.
Baby blue and chocolate brown interiors feel comforting and sweet when there are vases of pink sweet peas, baby roses or begonias with dappled green foliage situated on side tables and on windowsills. Herbs that are mostly green with small pinkish blooms, such as scented geranium, feel natural and add a pleasant scent to the ambiance.
Make your blue and brown occasion a contemporary happening with a blend of buds in electric, light and purple-blue with foliage in shades from silver to deep green. Use stems of blooming lavender, armfuls of bachelor's buttons, forget-me-nots and Himalayan poppies, or venture into a florist's shop and see what is in stock; artificially colored varieties, such as carnations, or a long stem of real or faux blue berries complete the arrangement.