@jandomvas: Hello there,
Go to => Appearance => Customize => Additional CSS and add the following CSS Code.
/* To change background color of custom header in Blog page */
.blog .custom-header::after {
background-color: rgb(0, 0, 0);
}
You can change the color according to your choice.
To have right sidebar on homepage
Go to => Appearance => Customize => Theme Options => Layout Options => Homepage Layout => Select Right Sidebar and Publish.
Then,
Go to => Appearance => Customize => Widgets => Sidebar => Add your widgets and Publish.
Let me know if this works out!
Kind Regards,
Skandha