Sparks and Bits are custom hex code colors.

[color=6699FF]6699FF for Sparks[/color] [color=CornflowerBlue]but cornflowerblue may be used.[/color]
[color=8493ca]8493ca /was/ for Bits[/color] [color=slateblue]but slateblue may be used.[/color]

some of those codes are invalid, such as Cornflower.  It's actually cornflowerblue.