demu1037
Western Thunderer
Chromatic blue seems to be a recent myth, probably born out of poorly processed colour pictures of the day, or as is more likely badly mixed paint,
Officially, I think there are only two blues, BR blue and BR Electric blue, the later was applied to Al1-AL6, EM2 and Glasgow blue train units....or a very close shade.
Heather, sorry for the totally irrelevant waaaaay OT, I'm more than a bit passionate about juice jacks I'll stop now and let y'all get some peace and quiet LOL
Mick - don't forget JB's - they were electric blue too!
and for a bit of BR blue.....
Regards
Andy