In the arc theme, for ubuntu unity, the nautilus' left panel could have a lighter color.

Yea, it's blending in a bit with the toolbars. I'll make it a bit lighter.
:) thank you
Better leave this open or I'll forget :)
Hi @horst3180, is there some progress here? Can I make somthing to help you?
I think It's better to have Arc Lighter. I tweaked Arc GTK3 on nautilus part and I have this:

How you did it @JustPerfection? It looks cool :+1:
@Anyanka13 Backup '/usr/share/themes/Arc/gtk-3.0/gtk.css' and replace uploaded file with the gtk.css
It's the latest version of ARC and I modified that. Also I modified selected color. Enjoy.
OMG! Thanks a lot! :1st_place_medal:
In case anyone would like to edit it manually: look for .nautilus-window placessidebar.sidebar and .nautilus-window.maximized placessidebar.sidebar to change sidebar background color. .nautilus-window placessidebar.sidebar row.sidebar-row and .nautilus-window placessidebar.sidebar row.sidebar-row .sidebar-icon to change text and icons color. Then .nautilus-window placessidebar.sidebar scrollbar,, .nautilus-window placessidebar.sidebar scrollbar.overlay-indicator:not(.dragging):not(.hovering) slider and .nautilus-window placessidebar.sidebar scrollbar trough to change scrollbar colors. I hope I haven't missed anything...
I made it white - it looks pretty decent in my humble opinion.

Base color changed with https://github.com/erikdubois/Arc-Theme-Colora/ by the way. ;)
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I think It's better to have Arc Lighter. I tweaked Arc GTK3 on nautilus part and I have this: