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UI Essence
warning, Error, exclamation
Black
512x512
Game play
skull, danger, play
Signs & symbols
Outline
User interface
Alert, warning, Attention
Construction
warning, equipment, danger
Crimson
electricity, high, danger
iOS & Web User Interface Multi Circle Flat vol 4
hot, Burn, fire
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Signs
Flat
Factory
Alert, warning, exclamation
Gray
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Medical
Poisonous, Healthcare And Medical, danger
Chocolate
medical, Dead, skull
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Web
danger, signs, Shapes And Symbols
Biochemistry
education, Biohazard, Toxic
Laboratory set
miscellaneous, Biohazard, Toxic
danger, dangerous, signs
Lab elements
Halloween
Halloween line
pirat, Bones, scary
Weapons
Bomb, explosive, miscellaneous
DarkSlateGray
danger, hazard, signs
Goldenrod
Education
Science
hazard, Signaling, education