Pie ignores non-positive values. Therefore, both arrays you declare are treated as the same to pie, and are interpreted as [1]. This is why you see that pie is treating both inputs as being 100% red.
One workaround you could use would be to call colormap twice, once after each plot. This would give you the desired colors. Other than that, it seems you would need to input some non-zero information into the pie chart. Otherwise, they will be ignored.
