Floor Sign

These “Caution: Wet Floor” A-frame signs are way more interesting than you might first think. The bright yellow isn’t just an arbitrary choice; in safety-sign standards it’s the conventional color for “CAUTION” level hazards (i.e., something that could cause minor to moderate injury, but short of “you might die” territory). That’s why you see yellow paired with the word CAUTION so consistently across workplaces.

Then there’s the slipping-person silhouette, which is basically a tiny piece of global visual language. The “person slipping” icon maps closely to standardized warning pictograms used internationally for slippery surfaces (ISO 7010 includes a specific “slippery surface” warning symbol). The idea is: even if you don’t speak the language, you instantly understand what kind of danger this is.