Help with HTML for a link on my blog

[lydia2]

Hi, I'm facing issues with trying to edit a link on my blog. On my website, >blog > scroll right down to the bottom, there is actually a button '<< Previous' that leads to page 2 of my blog. However it's in a white colour so it just blends in with my blog background. (You can see it when you try to highlight the bottom and it shows up against the highlighted background). I've tried sifting through the HTML, but i can't find the part of the code which sets this link to white. Can anyone try to see which part is modifying the style of this button / link so I can change it to black or another colour that's visible? 

lydiagan.weebly.com/blog

[Powershellder]

its the 

#ffffff

Located in the main_style.css

In line 19

 a, a:hover { color: #ffffff; text-decoration: none; -webkit-transition: all 200ms linear; -moz-transition: all 200ms linear; -o-transition: all 200ms linear; -ms-transition: all 200ms linear; transition: all 200ms linear; }

No idea how to change it though. Nothing in theme options or something? (As im running a custom theme my options there are a bit different then normal so hard to find anything specific for me   )