The MDX keywords in a cube script were not properly changing colors in the SQL Serve Data Tools (SSDT) Preview version for Visual Studio 2015. (14.0.60316.0). (See my previous post on this problem here.)
The different keyword colors make it easier to write, organize and read an MDX script inside a cube.
The following picture show Adventure Works script inside the latest SSDT.
Here is the version information for the latest version of SSDT available at the time of writing this post.