The reason I came up with this is because in High School and in College they taught us the same offensive phrase, bad boys, etc, but Violet gives willingly. Although this is easy to memorize, it didn't make it easy to remember a color for a number without having to think of the entire sentence. If you memorize each picture association I have provided, you will remember the colors for the numbers.
These are what work for me based on objects that first popped into my head. You should choose objects that are easiest to remember based on your mind and what you first think of.
The trick to making them stick is to make them as ridiculous as you can think of. Or link them to things you like.