Change header and sidebar background color

Would you please advice on how to change header and sidebar backgrounds color?
Thank You


You can change header color with custom css code below:

.header-fixed {
    background: rgba(255,0,0,.8);

it is rgba value so you can use this link to generate it properly Last value in parenthesis is amount of opacity

Sidebar color can be changed with custom css below:

#sidebar {
    background: #ff0000;

Of course, change background color values to your liking.

Best Regards