How to check if touchpad is real?

[ranajit saha]

Yesterday I got my phone from Samsung service centre. They replaced my touch pad. But now I am noticing some differences on colour as compared to the previous touch pad (which came with this phone). Eg the white colour is blueish. I am using unrooted kitkat. I maybe wrong. But how to check if the touch pad is original?

Posted from Samsung Galaxy S4 (GT-I9500)