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Signs & symbols
Glyph
Web UI
Safe, Circle, privacy
Black
512x512
Web UI color
green, Lock, secure
LightSeaGreen
Bold Purple (Free Samples)
security, Unlocked, Blocked
MediumOrchid
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Miscellany Web icons
Antivirus, shield, security
384x512
Protection, security, Key
434x512
padlock, security, protect
371x512
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Buttons
Error, Lock, Clear
Firebrick
security, protect, warning
Goldenrod
help, Protection, security
Teal
protect, shield, ok
OliveDrab