Ariana,

I still can't answer your question until I know how you are applying your colors to the fabric. I don not understand the term "flooding." Nor do I understand what you mean by "true rich deep color."

The first thing I notice from your new post is that the range from darkest-black to lightest-white in this cloth is very shallow. Could this be why you feel the colors don't have proper depth? I assume this is what you mean by "deep color."

What you are doing is best understood in HSB color mode. The optimal way to convert this robe from one color to another without losing detail is to alter the Hue and Saturation (H and S) while leaving the Luminosity, aka Brightness (the B in HSB). Are you sure your method affects both the Hue and the Saturation? I assume this is what you mean by "rich color."

I hope this helps.

They had chained him down to things that are, and had then explained the workings of those things till mystery had gone out of the world....And when he had failed to find [wonder and mystery] in things whose laws are known and measurable, they told him he lacked imagination, and was immature because he preferred dream-illusions to the illusions of our physical creation.
      -- HP Lovecraft, The Silver Key