Border-color overrwriten

Hi,

I am using some custom CSS to add borders in few places accross my blog. The main issue is that if I add any border with a specific color, the color is replaced by rgb(170, 170, 170); It is not overrwriten by another rule, but in my rule where I have placed #aaa, a perviously mentioned color is placed. Again switching of all plugins does not help. Any idea how to fix it?

You can see the issue on my page here http://customizewp.com/eliminate-render-blocking-javascript-and-css-above-the-fold-content-in-wordpress-w3-total-cache/ . Each image has a border on top and the bottom and at the end of the content is a thick line. All of them are suffering from this isse.

regards
Bogusz