Generally...

Cool colours and tints will make a space appear larger.

Warm colours and shades will make a space appear smaller (and sometimes smaller is desirable).

Cool colours and tints make an object appear smaller and lighter in weight .

Warm colours and shades make an object appear larger and heavier in weight.

Contrasting colours contract space .

Similar colours or values expand space .

White, grey or colourless spaces are poor choices where people are to gather and interact.
 
Perception of time and temperature differs depending on colour .

Time seems to pass more quickly in warm spaces.

Time seems to pass more slowly in cool spaces.

Temperature is perceived as hotter in warm spaces .

Temperature is perceived as colder in cool spaces.

Warm colours and earth tones encourage and maintain body warmth and physical action.

Cool colours are conducive to mental activities, projects and research .

Cool colours can have a dampening effect on the level or quality of conversation.


Exercise care in using white for highly illuminated spaces

It can create glare and headaches

It can be easier to make mistakes