Hi there,
For the background color of the single blog posts kindly add the code below to X > Launch > Options > CSS:
.single-post #top {
background-color: hsl(0,2%,30%);
}
For the sidebar, you see that most of the items are links, and the heading tags with border colors, kindly add the code below:
body .x-sidebar .widget a,
body .x-sidebar .widget ul li a {
color: hsl(0,0%,84%);
text-decoration: none;
}
body .x-sidebar .widget a:hover,
body .x-sidebar .widget ul li a:hover {
color: hsl(0,0%,50%);
}
body .x-sidebar .widget li {
border-color: hsl(0,0%,50%) !important;
}
body .x-sidebar .widget .h-widget {
border-color: hsl(0,0%,50%);
color: hsl(0,0%,50%);
}
You are welcomed to change the colors in the code and play with them to see what will be the correct case for you.
Finally, add the code below to the same place to remove the vertical lines of the header menu:
.x-navbar .desktop .x-nav>li>a {
border-color: transparent !important;
}
Kindly open up separate threads for each additional question, that will help us to focus on each case and give you a better service.
Thank you.