Cleansing and innocence, attraction, and openness. Symbol of virginity and innocence.
A desire to go through life undefiled.
The color white in a dream points to purity—the dreamer is either living a pure life or is longing for it. One is seeking cleansing, and probably is already cleansed in a certain sense, simply by having a dream about the color white. But it could also suggest exaggerated cleanliness, an addiction to washing and cleaning, etc.
On the other hand, white can also be an expression of fear, such as the white whale in Moby Dick and the great white shark. Here the reference is to a blinding white color. Ghosts, like those appearing as mice during delusional episodes (delirium tremens), are always white.
The archetype of the wise man is usually clad in white (the guru, and also the physician). White is also the fundamental symbol for the animus; it addresses the male intellect and also male aggression (when white is experienced as blinding and gleaming).
The union of Red and white is that of contradiction: it is the symbol of the mystical marriage and Tantric sexuality (white semen and red menstrual blood). Here is where innocence meets the physical body and where heaven meets hell. Red and white are the colors of alchemy as well as the colors in the coats-of-arms of England and Switzerland.
Mabinogion, the ancient Welsh epic poem, refers to the white dogs of the underworld, except they have red noses and red eyes.
According to Freud, white always points to the feminine.... Little Giant Encyclopedia