accident
alarm
alert
attention
background
banner
beware
black
button
caution
construction
danger
dangerous
electric
electricity
error
exclamation
hazard
high
icon
illustration
important
industry
information
isolated
label
mark
message
point
poison
risk
road
safety
security
shiny
sign
skull
stop
symbol
traffic
triangle
voltage
warning
web
white
yellow
zone