Is it normal to associate people with colors

All my life I have always associated people with colors. Usually the colors are very specific and vivid. Sometimes the they come in combinations like I associate my brother with blue and white in a stripped pattern. I should note this pretty much only happens to people I have met in person. Also these colors only very rarely change, and usually only change if my perception of the person changed substantially. Ie a friend who proved untrustworthy went from a sort of washed our forest green, to a shade of gray almost black.