USA colors:
'03: Tower Silver Metallic NH478M
'04: Pearl Coronado Blue PB255M or PB255P
(two numbers noted, if anyone confirms that one or the other is correct, notify the KotAOW)
'05: Candy Graceful Red R151CU
'06: Graphite Black NHB01
'07: Digital Silver Metallic NHA30M
'08: Candy Glory Red R101CU
'09:
UK colors:
'02: Candy Ambassador Red *R275C*
Jeff Bertrand adds this info about ST1300 wheels:
I know the color code for the wheel paint of the '05 STs is NH167M. I think this is true for all ST1300s from '04 through '08 and I expect '09. The '03 wheels were black.