Any dark blue, blue jeans will look great. Black pants or black jean will also look stunning. Try to accessorize with braceletes and hair bands or clip that match the colour of your shoes. If you pick a pant colour like beige tan, or anything in the same colour range it will look tacky.
There are many colors that go with pale yellow. All of the solid browns, tans, and most of the oranges and peach look good, also any print with these colors.