The word 'charka' is derived from 'cakram,' which is Sanskrit for 'wheel' or 'circle.' Tonnes of literature can be found covering what they stand for, what they do to influence our existence, and how to channel them. Being as they're based in color, it was a great place to look for color inspiration. Oddly enough, or perhaps obviously, the colors that represent each chakra coincide with common color symbolism.

Aligning Chakras with Color

Violet - Crown

Related organ: Brain Personality Traits: Inspirational leaders, kindly and just, humanitarians, self-sacrifing, visionary, creative, and strong mentally. Personal identification with the infinite, oneness with God, peace, wisdom.

Indigo - Third Eye

Related organ: Eyes, lower head. Personality Traits: Intuitive, fearless, practical, idealistic, wise, a truth seeker, highly intuitive, faithful, clear sighted possessing integrity and clarity of mind.

Blue - Throat

Related organ: Throat, Lungs Personality Traits: Ability to verbalise, expressing truth through spoken word, loyal, tactful, affectionate, inspiring, inventive, caring, cautious, possessing the spirit of truth and purpose, and self expression.

Green - Heart

Related organ: Heart, Breasts Personality Traits: Soul-heart consciousness, expressing love in action, sympathetic, compassionate, humble, understanding, self-controlled adaptable, generous, nature loving, romantic.

Yellow - Solar Plexus

Related organ: Solar Plexus Personality Traits: Positive use of personal power, good-humoured, optimistic, confident, practical, intellectual, clarity of thought, alert, curious, perceptive, and aware.

Orange - Sacral

Related organ: Ovaries, Testes (lower abdomen) Personality Traits: Enthusiastic, happy, sociable, energetic, sport, self-assured, constructive, joyous, independent, free, seizes life, removes inhibitions, able to be oneself confidently.

Red - Base

Related organ: Spine, Hips, Legs Personality Traits: Vitality, courage, strong-willed, self-confident, humanistic, spontaneous, honest, extroverted, secure, pioneering, having strength of will, driven, and stable.

For more information on Chakras visit the following links:
Wikipedia Entry for Chakras
Sacred Centers Chakras Guide