Have no fear of perfection - you'll never reach it. -- Dali

Every language has a set of basic color terms and there is a universal order in which they develop. For languages with two basic color terms, these terms always refer to "dark/black" and "light/white". Three terms are always black, white and red. The next term to be added is "grue" (blue-green) or yellow, then the other. The last of the set order terms is the division of grue into terms for blue and green. After that it's a free for all for brown, orange, purple, pink and grey.

Advances in our understanding of emotion and affect have implications for the science of design. Affect changes the operating parameters of cognition: positive affect enhances creative, breadth-first thinking whereas negative affect focuses cognition, enhancing depth-first processing and minimizing distractions. Therefore, it is essential that products designed for use under stress follow good human-centered design, for stress makes people less able to cope with difficulties and less flexible in their approach to problem solving. Positive affect makes people more tolerant of minor difficulties and more flexible and creative in finding solutions. Products designed for more relaxed, pleasant occasions can enhance their usability through pleasant, aesthetic design.
Aesthetics matter: attractive things work better.