Both! They are great and I bet you could get a lot of use out of both as part of your spring wardrobe and then as a jacket for cooler summer days/nights.
I actually voted for blue (gasp!), it is super cute and pink looks really cute underneath. But I agree with Drew, if you can swing it get both or get the one that works the best with the camis/tops in your wardrobe.
Ok, now I'm changing my mind and think the pink is cuter (I'm no help ). Just get both