Checking out this site http://www.historicalkits.co.uk/Scottish_Football_League/Dundee/Dundee.htm it seems the red was introduced in 1952 with the socks, so the red is probably acceptable. I like the 1971-72 kit, absolute class.
What a goal that was, probably better than Maradona's mazy against Engerlund. IMO.
Speaking of Maradona, the film 4 documentary on him recently is well worth a watch.
Thank you.