Sidebar-Boxes-Color

hi, anyone knows the code to change the Sidebar-Boxes-Color?



the code i have is changing only the first 3 boxes of the sidebar but i need a code who change the color of all sidebar-boxes:

sidebar-box {
background-color:#0a0a0a;
}

div.sb-big-link div.big-link-block {
background-color:#0a0a0a;
}