We react to the colors instantly and spontaneously, in graphic design is the most important element of "emotional communication".  It has a deep impact in our choices that we do in ours routine.  Then colors interfere in our emotion and our emotions can to be translated in colors.  We´re able to analyze cycles of colors in the fashion that reflect the economy x emotional of the society. With 1 gigantic post the blog Digital World show many links that talk about colors, tools for to help, theory,  etc and + others links about colora are in my blinklist.com/santamistura/color/