Standard (EADGBE)

I'm adequately exceptional

I'm graduately proffesional

At being mentally deficient

I'm as shrewd as a sap

With an astute mental gap

Occasionally I can be consistant

I'm a fool

I'm a flop

I'm a failure

But you should never judge a book

 By its cover(colour)

Cause there's a heart

 That beats inside of me

Exactly the same for other verses