alert
attention
background
beware
black
button
caution
clipart
communication
construction
copyspace
cross
danger
dark
dead
death
error
exclamation
gold
graphic
hazard
human
icon
illustration
industry
information
internet
isolated
mark
message
note
post
red
risk
road
safety
secure
security
shape
sign
stop
street
symbol
template
traffic
triangle
warn
web
white