Ключевые слова: app, application, art, blue, button, circle, circular, color, concept, contour, cycle, design, direction, flat, gradient, green, icon, illustration, interface, isolated, item, line, linear, lineart, logo, mobile, modern, motion, outline, pictogram, pixel perfect, process, recycle, repeat, repetition, rotation, round, sign, simple, symbol, sync, synchronize, turn, ui, update, upgrade, user interface, web,