Currently the Category Glyph is only represented by a unique shape and various colors. Some of the users have issues with them and may not distinguish colors like Red / Green or Green / Blue or may see only in gray....
So, a little update in the system can help them to quickly differenciate all categories by seeing the shape and / or seing the number inside the shapes...
Example of Shapes and how we can use them:

And in the Software:
