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UI
3D
Gnome Web Icons
Dialog, Gnome, warning
Chocolate
32x32
warning, Dialog, Gnome
48x48
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Attention, warning, Dialog
DarkOrange
64x64
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Crystal Office Collection
warning, 24
Black
24x24
24, warning
Orange
Glaze
warning, messagebox, Alert
Nuvola
warning, important, Attention
128x128
Alert, Attention, exclamation
DarkRed
Crystal Clear
Info, warning
messagebox, warning