Bright
Part of speech: adjective
Definition: Visually dazzling; luminous, lucent, clear, radiant; not dark. Intelligent, brilliant. Vivid, colourful, brilliant. Happy.
Part of speech: noun
Definition: An artists brush used in oil and acrylic painting with a long ferrule and a flat, somewhat tapering bristle head. A neologism intended as a positive-sounding umbrella term to describe various kinds of non-religious and non-superstitious people. (There is a Wikipedia article on this usage.)
Example sentence: Your attitude is like a box of crayons that color your world. Constantly color your picture gray, and your picture will always be bleak. Try adding some bright colors to the picture by including humor, and your picture begins to lighten up.
Vivid
Part of speech: noun
Definition: A felt-tipped permanent marker.
Part of speech: adjective
Definition: clear, detailed or powerfulbright, intense or colourful
Example sentence: Our sense of power is more vivid when we break a man's spirit than when we win his heart.