Fluent Design System (codenamed Project Neon), officially unveiled as Microsoft Fluent Design System, is a design language developed in 2017 by Microsoft. Fluent Design is a revamp of Microsoft Design Language (popularly known as "Metro") that includes guidelines for the designs and interactions used within software designed for all Windows 10 devices and platforms. The system is based on five key components: Light, Depth, Motion, Material, and Scale. The new design language includes more prominent use of motion, depth, and translucency effects.