If you’re referring to the small space under the slider right before the footer, it’s because the .site-inner
background color takes over and shows the color over the image.
.site-inner {
background: #f5f5f5;
}
Adding this code should remove it from the homepage but will allow it to show on other pages if you want to keep it –
.home .site-inner {
background: none;
}
If you want to remove it from all pages just add background: none;
to the first code above on line 639 in your CSS.