Ключевые слова: action, annul, app, application, arrow, art, blue, button, cancel, color, concept, contour, design, direction, editing, flat, gradient, icon, illustration, interface, internet, isolated, item, line, linear, lineart, menu, mobile, modern, online, outline, page, pictogram, pink, pixel perfect, previous, program, remove, reverse, sign, simple, step, symbol, ui, undo, user interface, web,