Colurs need to be in HEX format e.g. C1C1C1. A tables of colours and there HEX code can be found here
{{infotable |Maintitle = |Maintitlebackcolour = |Mainwidth = |Body = |subheading1colour = |subheading1 = |subheading1width = |subheading1text = |subheading2colour = |subheading2 = |subheading2width = |subheading2text = |subheading3colour = |subheading3 = |subheading3width = |subheading3text = |subheading4colour = |subheading4 = |subheading4width = |subheading4text = }}