Washington State codes say that the only color that can be displayed in parking or turn signal lights is amber... Is it like this in other states i wonder?
http://apps.leg.wa.gov/RCW/default.aspx?cite=46.37.200
http://apps.leg.wa.gov/RCW/default.aspx?cite=46.37.100
http://apps.leg.wa.gov/RCW/default.aspx?cite=46.37.150
im very confused and conflicted.
I thought this may help you out STL...