I use the package 'SyncedSidebarBg" to keep the color scheme of the side bar in line with the main editor - it works reasonably well, but I see this in my console log (goes away if I remove SyncedSidebarBg):
Errors parsing theme:
icon_file_type is missing layer0.opacity, setting to 1.0 for backwards compatibility
icon_folder is missing layer0.opacity, setting to 1.0 for backwards compatibility
Is there a cleaner way of achieving what SyncedSidebarBg does? FWIW, my main color scheme is CheerfullyDark which I love.