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UI
Pixel
Tango
Sender, mail, reply
Black
32x32
mail, reply, All
WhiteSmoke
Computer & hardware
Smooth
Crystal Project
reply
256x256
Email, reply, mail
Message, reply
22x22
Photography & graphic design
3D
Dark Glass
mail, reply
128x128
Glaze
DimGray
64x64
Network & communications
Oxygen
File, paper, write
48x48
All, mail, reply
Lavender
Function icons
reply, mail
DarkGray
Business & finance
SEM Labs
Mixed
Carpelinx
Desktop apps
KDE Crystal Diamond
Nuvola
DarkSlateBlue
Crystal Clear
Gainsboro
Green
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Khaki