Predicting Colour of Car - New Rasi Sutras Course

Dear Mr. Wilhelm,

In the combinations of colours emerging from the additive theory of colours, which you use to assign specific colours to the rasis (Class 20, New Rasi Sutras Course), to which Rasi should the silver colour be assigned? Would it be Virgo due to its shiny quality?

Thank you.

Best,

Krishnamurari