I was thinking of this colour:
Vivid orange-red. Yes, the red in your photo is far more vivid than the red demonstrated by Unicomp in the photo they sent me of available shades. However, I did specifically have orange-red in mind. I know I won't get the double-shot moulded white lettering though.
The other colour I love is the soft blue-green function keys on the
Acorn Archimedes A3010. Note that the function keys have black legends, which would make the above a lot cheaper to reproduce on a Customizer.
I'm holding off ever buying another Unicomp (I gave mine away) until I've decided on my perfect colour scheme, and someone who can source the correct plastic colours.
Interestingly, you mention the double shot posts -- the original double-shot post had a photo of a keyboard with the exact same dark olive drab colour as on the BBC Micro keyboard above, which gave me a pang of joy because I came one pigeon step closer to this being possible:
Pretend it's fully lettered -- Photoshop 7 doesn't possess the requisite perspective skew for text and I am not going to letter that by hand.
I love the look of the A3010, except that I just can't see myself with a white keyboard. Which is why, if I do like the TP3, I will be really hoping someone comes up with a 105-key
black Fukka keyboard …