Ключевые слова: accident, advice, alarm, alert, attention, background, banner, beware, black, button, careful, caution, clean, clear, concept, damage, danger, design, error, failure, grungy, halt, hazard, hazardous, illustration, industrial, information, isolated, message, post, prevent, protect, road, safety, secure, security, shape, sign, square, stop, street, symbol, template, triangle, triangular, warn, warning, white, yellow,