nav color confusion

In _base.scss there is both
line 139
$nav-color-link: #fff;
$nav-color-visited: #fff;
$nav-color-hover: $color-gray;
$nav-color-active: #fff;

and
line 158
$color-nav-link: $color-gray-lt;
$color-nav-visited: $color-gray-lt;
$color-nav-hover: #fff;
$color-nav-active: #fff;

These should be clarified and reconciled.