Colour Effect

Colour meaning in every culture have different meaning.

White

Is the sum off all colour in terms of additive colour mixing.
It's perfect, and symbolises light, purely, modesty, truth, neutrality, intelligence, science and precision - but also stand for emptiness and the unknown.
Anything intended to be hygienic is also white.
Being "whiter the white" suggests irreproachable behavior.
The word "candidate" coma from the Latin "Candidus" and Means gleaming white, snow-white, natural, straight-forward and sincere.
White is not colour; is achromatic.

Light & Colour

• Light is Colourless
• Perceiving colour is simply a human sensory experience, usually caused by physical stimulus.
• The colour stimulus can either directly from the light source or indirectly, via the surface of solid.
• Additive colours (light colours) are created by light addition.

From:
The Little Know-it-All
Common Sense for Designer
By Deigestatalten Verlag