Umber is one of the few color names starting with the letter U. In the United Kingdom, Canada, Australia, etc., it is called umbre. Umbreon would've been umber, but the devs decided to paint it black as a rolling stone.

Umber's polar opposite is amber.

Colors
Red • Orange • Yellow • Green • Blue • Purple • Black • White • Pink • Brown • Gray (Grey)
Cyan • Magenta • Indigo • Violet • Rose • Gold • Silver • Bronze
Fuchsia • Beige • Amber • Lime • Lemon • Tan • Teal • Olive • Khaki • Sky Blue • Navy
Maroon • Crimson • Vermillion • Scarlet • Coral • Salmon • Peach • Cream • Lavender • Lilac • Aqua • Turquoise • Emerald • Ochre • Sienna • Umber
Light Gray • Dark Gray • Burgundy • Auburn • Ruby • Sepia • Taupe • Banana • Spring Green • Mint • Jade • Aquamarine • Azure • Sapphire • Amethyst • Plum • Neon • Ivory • Platinum
Apricot • Tangerine • Marigold • Wheat • Chartreuse • Moss • Kelly • Celadon • Periwinkle • Cerulean • Cobalt • Ultramarine • Blueberry • Iris • Grape • Thistle • Mauve • Orchid • Strawberry • Cerise • Vanilla • Chocolate • Mahogany • Chestnut • Ebony • Charcoal • Gunmetal • Key
Coquelicot • Persimmon • Sunburn • Peru • Goldenrod • Citrine • Vitellary • Dandelion • Pear • Mindaro • Goo • Slime Green • Sage • Asparagus • Harlequin • Erin • Malachite • Pakistan • Verdigris • Viridian • Alice Blue • Electric Blue • Capri • Cornflower • Glaucous • Victoria • Zaffre • Eggplant • Heliotrope • Puce • Mulberry • Amaranth • Snow • Pearl • Xanadu • Feldgrau
Eigengrau • Vantablack