I find the colouring to be integral to the meaning of the cards. I use the Original Rider Waite deck but you can see the differences in the decks if you look at this link:
http://www.tarotpassages.com/waite.htm
It shows the difference in colouring between the Original, Universal, Albano-Waite and Golden Rider.
I use this as a basic guideline:
BLACK: The unknown, the center of the earth or situation, black shadow (anima), the darkside of the soul, new psychological territory
Darkness, formality and convention. Since black is the absence of light it can symbolize ignorance and restrictions
BLUE: Open sky, space and clear water, spirituality, tranquility, meditation
Consistency of purpose, strength and reliability
BROWN: Connected to nature and the earth, rooted in the soil
Practicality, plainness and honesty
DARK RED: More violent or passionate emotions than bright red
GREEN: Healing, prosperity, fresh, young, promising, inexperienced, immature
Fertility, vegetation, stability and healing
GREY: Unawareness or deliberate indifference
Neutrality or uncertainty
OLIVE GREEN: Envy and cunning
ORANGE: Strength, success, joy
Ambition, intelligence and earthly desires combined
PINK: Emotional love, harmony, self-love, friendship
PURPLE: Spirituality, intuition, mystic ideals, a highly developed imagination
RED: Heart, soul, willpower, vitality, love, passion, courage
Passion, earthly desire, action and the need to use direction, optimism and cheerfulness
REDDISH BROWN: Sensuality
VIOLET: Experiencing boundaries, a mixture of blue and red meanings
WHITE: Beginning, ending, healing, white shadow (animus), union through the mind, new intellectual frontier, purity, protection
YELLOW: Sun, consciousness, zest for life, clairvoyance, communication
Pure intellect and scientific thought