I really don't know why Tamiya does that with their colors. It is frustrating trying to follow their painting guidelines, when Tamiya's newer kits ONLY list the AS Spray Can #s. Those AS #s DO NOT correspond to any other type of Tamiya paints. All I want to use are Acrylic paints; No Rattle Cans!
Somebody could do a huge business if they created and sold Tamiya Spray Can to Tamiya Acrylic color conversion charts!
I guess it would be too logical, to expect Tamiya to create one, for their OWN products!