Some bits of information and links for stuff I found on the web for the restoration.
https://en.wikipedia.org/wiki/Triumph_Tigress/BSA_Sunbeam
http://www.caclassicscooters.com/classic-triumph.htm
Found a blog that talked about the paint colour….
Paint Colour
I collected my freshly painted panels from the painter this morning. It looks like a close match to me –
VW River Blue Metallic (Code LK6V shade No.1)
Tetrosyl Polyester reference code: PO6572
Epoxy primer. Undercoat. Three base coats. Four coats of clear lacquer.
http://www.bsafiles.se/misc/BSA_Color_Codes.htm
shows – 140 POLYCHROMATIC ZICON [sic should be ZIRCON?] BLUE 7/1/59 BECAME POLYCHROMATIC SHELL BLUE SHEEN 9/1/59