Create a multicolor (gradient, palette) bar in Plots

In Julia is easy to assign a color to each bar with Julia Plots, but how can I combine colors for each bar, suppose I want to apply a kind of palette to fill the bar.

Thanks.

Can you show us an example of the picture of the plot you are interested in?
If you cannot reproduce the example by code, can you at least hand draw it?

Sure.

multiclorBard

In Plots.jl you could use for instance heatmap() and simple custom functions to generate equivalent colored bars, but I am not aware of a built-in way: