I did eventually stumble upon the right variable to alter in the CSS. Let me login and I’ll paste in what I ended up with for CSS changes. Doesn’t Eric’s Cobalt Apps/Dynamik-Genesis child theme rule all others? Damn, I love it. Ultimate freedom.
Sorry, I meant to title this post something like “Editing bbPress CSS in Genesis/Dynamik Website Builder” but I guess I didn’t finish it off before publishing.