My mom has blue eyes and my favorite color on her is Mythology (shimmery pink bronze). You could try Expensive Pink (sort of a golden pink) and Swish (frosty pink-lavendar), not that Swish is especially subtle. I've never tried Orange Tangent (light tan orange), but it's still for sale on the MAC site, and it sounds like it would accent your eyes beautifully... PARADISCO! I can't believe I didn't think of that first. Try Paradisco (sheer frosty golden peach). Pretty much any light orange, peach, pink, gold or bonze is worth a try. You could line your eyes with a darker blue to make them look lighter, especially if they're already a pale blue, or use a light blue to make them look darker. Sumptuous Olive (shimmery golden olive) is also hot with blue eyes, from what I hear.
Good luck.
Oh, and just so you know, you can get advice from a MAC artist in person or online for free if none of the suggestions here work for you.