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Signs & symbols
Outline
User interface
Alert, warning, Attention
Black
512x512
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Glyph
Emergency signs
cross, sos, sign
Gold
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mark, emergency, sos
Code, electrocution, danger
sos, sign, radiation
509x512
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Buttons
warning, Alert, danger
Goldenrod
Burn, Alert, warning
dangerous, danger, Radioactive
Adware, malicious, virus
UI navigation
warn, danger, warning
Crimson
Flat
Circle Icons
Attention, danger, Caution
IndianRed
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3D
Free 3d Glossy Interface Icon Set
Attention, Error, cautious
64x64
warning, danger, Alert
Prompt, danger, exclamation
Message, help, Prompt
OrangeRed
Prompt, help, danger
Smooth
32px Rounded icons
Radioactive, danger
DarkSlateGray
32x32