[Tilesathome] primary roads color

[Frédéric Bonifas]

Hi,

The primary roads are rendered in pink from z12 to z15 and in some
dark red-pink for the zoom levels 16 and 17.
Is there any reason not to use the same color ?
I personnaly prefer the "dark red-pink" (same color as for the mapnik
layer I think).

Frédéric