accident
alarm
alert
attention
background
banner
banner design
beware
black
button
careful
caution
computer
concept
danger
dangerous
design
error
exclamation
failure
general
graphic
hazard
icon
illustration
important
info
information
internet
isolated
mark
message
mistake
point
problem
realistic
risk
safety
security
sign
signal
site
stop
symbol
traffic
triangle
warning
web
white