Thanks for your reply. Your solution changes the slider color. I need to change the scale MARKER colors similar to the JPG file I have attached. I see no way to select on an individual marker and specify its color (e.g. set marker "8 -" to red).
Good idea. I will configure multiple sliders to look like my desired colored markers and then lock them in place.
Looking again at your picture, it seems that these values are static and pairwise define ranges. You probably could even hide the added sliders and play with the fill color.
Or you could even just play with decorations.
My solution uses 6 vertical sliders, with sliders and markers hidden, that are programmatically colored and positioned over the desired horizontal marker locations at runtime. The desired marker locations and colors vary from run to run. For technical reasons, my solution does not work for the general case. So using one horizontal slider with multiple active sliders as markers seems like a good solution. I have not tried the idea so I will update this post with the result when I am done.