What colour are polarised lenses?

I want to purchase some polarized glasses through PrescriptionGlassesOnline.net. My question is if I want polarised lenses, do I just order clear and then select polarised or do I have to choose a tint first?

Can I order regular frames and then choose polarised lenses or do I need to select sunlgasses frames?
Thanks.

For regular tinted lenses, you may select lens package AT,BT or GT.
If you want polarized sunglass lenses, please choose lens package E after filling out your prescription.
Hope it helps.