Minor Bug

[Kardinal]

Chart Properties Dialog
> Grid Lines Section
> Horizontal grid lines & Vertical grid lines
> Colour

The colour selection seems to be more like a set of Windows functions, eg Active Border, Control Light, Desktop, Menu etc rather than a proper colour palette Red, Green, Blue etc

[NinjaTrader_Dierk]

Please try the other tabs on the drop down: "Custom" and "Web"

[Kardinal]

I hadn't spotted those tabs before... Web is the one I'm after. Interestingly every other Colour selection menu defaults to Web for its Colour Palette, yet these two functions default to System.