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UI
3D
Gnome Web Icons
yes, ok, tick
Black
64x64
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Glaze
green, ok, Check
YellowGreen
Nuvola
yes, green, Accept
ForestGreen
48x48
yes, Check, good
Crystal Clear
on, select, correct
128x128
ok, good, yes
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yes, red, Check
DarkRed
20x20