Rubbertoe made this Instagram post which mentions they provided two prototypes to Character Options for the toy to be based on:
https://www.instagram.com/p/BFUHDZ9lfim/
There was also briefly a red setting when the sonic was being designed but whoever is in charge decided against it for the show:
https://www.instagram.com/p/BFZQzV1FfkW/
https://www.instagram.com/p/BFUHDZ9lfim/
The CO version of the 12th doctors sonic is on the way. I provided them with these two replicas to prototype from, so it should be pretty spot on. Plus the fact there are no moving parts The unpainted version was then sprayed grey and scanned.
I'm glad to be involved in helping CO create there most accurate sonic yet.
There was also briefly a red setting when the sonic was being designed but whoever is in charge decided against it for the show:
https://www.instagram.com/p/BFZQzV1FfkW/