I'm among those who have the codes in my head - I can't imagine having to whip out an iphone, chart, card, or go to a computer to decode a resistor.
Most people memorize a ten word phrase, but that is awkward - to get to grey, you have to think B___ B___ R____ O___ Y___ G____(No, not that one!) B___V____G Ah, that's it. Grey is 8.
Back when I took Vocational electronics in High School, I learned a silly system that associated each color with a number. After a while, I, just like a previous poster, just think "five" and "Green" at the same time.