change tile background color

hi steve,
I”m trying to change my tile-plus tile bg to white. I like the gradient with #FFF instead of #E3E3E3. or remove the gradient and just have white bg. But, inspect element in browser the bg-color crosses out the style, if i try to put it in an element.

In custom CSS, I’ve tried the following;
#cn-tile-plus .cn-entry.cn-background-gradient {
background-color: #fff;
background: *;
}
and
#cn-tile-plus .cn-entry {
-moz-box-sizing: content-box;
-webkit-box-sizing: content-box;
box-sizing: content-box;
background-color: #fff;
}