Ключевые слова: accident, aid, airline, alert, attention, background, banner, beware, blue, care, caution, cloud, cockpit, concept, construction, copy, danger, dawn, drive, emergency, factory, first, health, help, industry, message, notice, person, protect, protection, risk, road, roadsign, safe, safety, secure, security, shape, sign, sky, space, symbol, tourism, traffic, transport, violet, warn, warning, workplace, yellow,