Focus on the header of [oyorooms.com](www.oyorooms.com). As soon as you scroll down even a tiny bit, the red color changes. Now do a two-finger click on the header, the original color appears behind the area occupied by the options list.
Looked around a bit, and found the same thing happening with [foodpanda.in](www.foodpanda.in).
Maybe this a Mac specific occurance (I am using a Macbook Air). Does anyone know why this is happening?