Answered[ Edited ]
Just have fun with it!!! Its always interesting to see a bright eyeshadow with a neutral toned outfit, or vice-versa. In my opinion, when you apply rules to makeup, you're defeating its purpose; self expression! You can match your eyeshadow to your outfit; just take a dominent (or secondary!) color from your outfit and match your eyeshadow to it, its okay if its a little off because they're not right next to eachother so there wouldnt be an accurate comparison to work off of.
Just do what expresses who you are