Ключевые слова: app, application, art, bicolor, button, cancel, clipart, close, color, concept, cross, delete, deny, design, dual, duo tone, element, exclusion, exit, failure, filled, flat, gradient, grey, icon, illustration, image, interface, isolated, logo, logotype, mark, mobile, negative, option, phone, pictogram, pixel perfect, red, simple, software, solid, symbol, ui, user interface, ux, web, wrong,