I'm happy with Mathematica's inbuilt Colour Function Editor. However, I wish to add some extra functionalities to this to make it customised for my purpose. For example,
I wish to manipulate the number of bins for the histogram plot.
By default, the number of keys should be equal to the number of peaks in the histogram and the key should be placed exactly at the peak points.
I also wish to have a provision to apply custom colour scheme as well.