u can use almond oil drops .take two drops n gently massage whn he is abt to sleep .leave it .

Just wait for a while,  even my baby's lips were dark.. By 3rd month they were normal in color

Agree with Roopashree.  Don't worry.

after feeding.. . wipe lips with red cloth

Hai.. There are two reasons..one is genetic. If baby lips are little darker by her nature..then nothing can change it. Other one is... as baby will be latching all the time.. for couple of months..baby lips will become dark. It's normal and no need to worry.