What color eyeshadow should I wear?

It would be easier to answer if you posted pictures, but i understand if you wouldn't want to. Since you have multicoloured eyes, It would depend on what colour you wanted to bring out. If, for example, you wanted to bring out the green in your eyes use a medium pink such as in the fith row in the palette on the link. For blue use the second and third (purples and oranges). I also find that greys and black work well for almost any colour, and multicoloured (first row). Use a blue or teal (fourth row) to bring out the golden specs in your eyes. I hope the link works for you.