update background color to use predefined theme

src/Components/Sidebar/index.jsx

@@ -208,7 +208,7 @@ function Sidebar() {
 				borderRight: `1px solid ${theme.palette.primary.lowContrast}`, 
 				borderColor: theme.palette.primary.lowContrast,
 				borderRadius: 0,
-				backgroundColor: theme.palette.primary.sidebar,
+				backgroundColor: theme.palette.primary.main,
 				"& :is(p, span, .MuiListSubheader-root)": {
 					/* 
 					Text color for unselected menu items and menu headings