Synopsis horizontal line colour to match index cards

Hi, I’m not sure where I should post this, but I suppose this forum is for suggestions?
I wish that the colour of the horizontal line on the synopsis sidebar (which separates the title and the synopsis) could match the colour chosen for the divider on the index cards; or, at least, that there is an option to change its colour separately.
Currently, I’ve found no way to make it anything other than the default red. It’s not major, but it’s a little pet peeve, given that the software has so many customisation options.
I’m reporting from Scrivener 3 for Windows.

Hmm, yes it looks like the synopsis does not actually track the appearance setting for index cards entirely, which isn’t the correct behaviour (so I’ve moved this over to bug reports).

In case you haven’t found the setting yet, it is in Appearance: Index Cards: Colors. At the moment the Divider setting only seems to impact the corkboard though.