PNG ICO ICNS MORE
Network & communications
Smooth
Oxygen
remove, delete, warning
Gray
48x48
Dialog, warning, Alert
Orange
PNG MORE
Signs & symbols
34aL volume 3.2 SE
Message, exclamation, warning
Tomato
24x24
UI
Function icons
noflash, Camera, warning
DarkSlateGray
warning, Camera
Error, warning, Info
DarkRed
16x16
warning
LightSteelBlue
Database, warning
Gainsboro
warning, Folder
DarkKhaki
warning, image
DarkGray
Alert, warning, user
Teal
warning, Users, two
exclamation, warn, warning
DarkGoldenrod
triangle, sign, Caution
Gold
Desktop apps
KDE Crystal Diamond
messagebox, warning
Black
22x22