You are right. I put the numbers and it works fine. Now if i want to put a light grey colour on roll over of that block, what should i do? when i put active-block, it takes a blue colour in the backround. i would prefer to put a light grey colour in front of the block if possible.
If you want to change the color, the appropriate code can be found in Custom css for page – http://prntscr.com/j0m61x This code make effect only on page where is added, but you can transfer it in Theme Options > Styling > Custom css to apply the custom css for all pages.