PNG ICO ICNS MORE
Snowish
wrong, Alert, warning
IndianRed
128x128
exclamation, warning, wrong
Firebrick
PNG ICO MORE
Minimal perception
Error, warning, exclamation
DarkGray
64x64
Dialog, help, question
Oxygen
Dialog, stop, no
DarkRed
48x48
stop, no, cancel
WhiteSmoke
password, Dialog
LightGray
warning, exclamation, Alert
Orange
Dialog, wrong, exclamation
Info, Dialog, Information
Teal
Ultimate Gnome
Dialog, remove, Del
Khaki
Check, Apply, correct
Black
wrong, Error, warning
Arrow, next, yes
Web Design Creatives
Dialog
Web Application
Box, Dialog
80x80
Oxygen-Refit
warning, wrong, Error
Info, Information, Dialog
Dialog, Apply
OliveDrab
help, question, gtk
exclamation, Dialog, Alert
Gold
OpenWorld
Dialog, Alert, stock
Red
stock, about, Info
Lavender
Information, about, Info