0.15.0.0-rc1 Traditional theme could use a smidge more contrast (branding)

[taw00]

Attached is a screenshot of the GUI wallet using the Traditional theme. The branding is almost invisible the contrast is so minimal. It could probably use a bit more oomph. Personally, I don't care for the Traditional theme, but, if we are going to have it, maybe improve it in this regard.

[PastaPastaPasta]

fixed by #3441