Hardcode Legend Colors

It would be nice to be able to use Measures or Field Values to dynamically code the color of legend values. Currently, we can use measures to lock in a single value per column, but cannot keep legend colors consistent across multiple visualizations programmatically. If a particular field value used in a legend either is removed from the data set, or a new one is created, the legend colors will update automatically, and without regard for the customers desired color per field value. It makes maintaining any visualizations that use a legend extremely time consuming and is prone to change often.