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Files & folders
Pixel
Glass Now Leopard Folders
Utilities
Gainsboro
512x512
Desktop apps
Lion Style Sidebar
DimGray
16x16
Mobile apps
iPhone Sidebar icons
Firebrick
UI
Gnome icons
Utilities, package
Black
32x32
Tango
Utilities, monitor, system
SteelBlue
terminal, Utilities
Gray