The vMix XML API currently does not expose the color category assigned to each input. While users can assign color categories (Red, Orange, Green, etc) to inputs via the vMix UI and filter them using the `SelectCategory` function, this information is not accessible through the API.

I'm building small web interfaces to simplify the mixing process for shows with ~20 inputs that only expose a subset of those inputs to a producer to cut a show without making breaking changes in the vMix UI.

I'd love to not maintain another state of input groups since we're already setting the color category in vMix for our subset of inputs.