I'm trying to plot a bar chart with colors (negative values in red and positive values in green), but they only plot in purple and white (using the UI in Darkmode)

I found this issue referenced in other posts, and I tried all suggested solutions, with no luck. 

The irony is that in the embedded backtest attachment below, it plots the right colors, but in the wrong chart format (uses a line instead).  In the actual terminal backtest (not embedded), the bar format is correct but the colors are wrong. 

Please advise.