Remember folks, any color but navy.
Most Helpful Girl
If you wanna play it safe, wear neutral colors (white, brown, grey.) Ex. link or link (I know it's not a polo...)
If you wanna play it up and go bold, then red, orange, pink, yellow... Ex. link or link (Again, I know they're not polos...)
But honestly, those pants are very similar to khaki pants. You could wear almost the same colors for khaki as you would for the pants in your link.