# Editing preset schemes

Mathematica has many preset schemes, for example "DarkRainbow" and "FadingRectangle":

Histogram[RandomVariate[NormalDistribution[1, 0.2], 100],
ChartStyle -> "DarkRainbow",

How can I get Mathematica to tell me the source code for these schemes? I want to reproduce "FadingRectangle", with some modifications of my own.
Try looking at the functions that show up after executing ?SystemBarFunctionDump*. –  Ｊ. Ｍ. Oct 12 '12 at 8:31