advice
alarm
alert
attention
background
beware
black
button
careful
caution
character
danger
dangerous
exclamation
figure
flat
gray
grey
hazard
icon
important
info
information
isolated
mark
message
object
orange
pling
point
problem
protection
risk
road
safety
secure
security
sign
signal
signs
single
stop
symbol
triangle
warn
warning
web
white
yellow