They could go down well with the LGBTQI community, but that's about all.
Which reminds me that if you ever drop a gold sovereign at a coin fair, be careful about bending over to pick it up.
I have, as you probably know, written to the Royal Mint about the colour and silver content. They have responded, and indicated that they would consider the suggestion, but the wording did not create the impression that an immiment change was likely. The RM Marketing machine presumably has considerable inertia and momentum, if that's not an oxymoron. They appear to have found a successful formula recently with Great Engravers, and Historic Monarchs, low mintage, large sizes, premium issues at premium prices, with low issue limits. With that success rolling along, there may be little incentive for making what might appear to be a minor change.
Another point is that because a vocally active RM competitor, a small dealer in Blackpool, has been pushing the idea, the RM might be reluctant to change as this might be seen as admitting they have been getting it wrong for the last 70 years.
One of my propoosals was that we would like a first year exclusive deal, where we take 500 yellow coloured proof sovereigns, and 5000 similar bullion sovereigns, paying slightly extra for the silver content and production costs. It is highly likely that the "Chard" coins would attract more demand, and command a higher secondary market premium than the copper coloured ones, and would provide a clear demonstration that our idea was sound. It would also be a good example of putting our money where our mouth is.
Two-coin sets, one red and one yellow coin, would also be an attractive idea for once.
If the RM were reluctant to run two different production lots of sovereigns, we could suggest that the Perth Mint make them under licence, so we would get a great colour, and solve the QC problem at the same time. Perhaps I had better not mention that to the RM!