Hey Holly!
I hear you on this and can see the benefit of this particular feature. I also know that a number of other members feel the same! To put greater emphasis on this need, please add your vote to the existing feature request here, Coloring of Columns 
You’re also welcome to add your vote to this request too, incase it’s also relevant → Column Color Shading.
Each quarter we take the top-voted feature requests to our development team for a status update. Keep on voting to bring such features to life!
You can read more about our feature request process here: All you need to know about our feature request process!