the meaning of colors can sometimes go the opposite of what we think

Spoiler:
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red may mean 'active' associated with a safety risk such as heat or risk of electrocution, while green is reassuring to be a sign of a low or zero risk, occupied or free, in the same way, a support on the left or at the bottom is also associated as a bet on OFF, but nothing prevents the reverse as on the switches in the lighting of a dwelling room, only the usual way is used to make the difference.