Migs,
I'm sure the plane was blue and silver - but what the closest match (FS number) would be escapes me.
I did a search on yahoo.com , "supermarine s6-b" and got 11 hits, most with photos, many in color, of current models. Maybe you can match the color from the photos - although the blue on the fuselage and floats looks like the same blue used on the blue/white/red tri-color tail.
Maybe someone else out there has more info.
Cheers
LeeTree