I was too busy to start mucking about with templates at the time. I still am, but the color is one that masks the title and possibly the subtitle of the blog, making them virtually unreadable - unless you squint your eyes (more) to detect minute differences in hue and tone between the rogue background and default text colors.
I've already saved the entire template of that blog to disk, Now I'm writing up this trouble-shooting report in this blog, which I've chosen for convenience as well as similarity of templates. The only thing I can find in the template that approximates the rogue color is:
name="titlecolor" description="Post Title Color"However, a preview after twiddling that color to FFFFFF showed no change in the banner background. So it's back to the drawing board. I'll try Blogger help....
type="color" default="#c60" value="#cc6600"
Nope, there's too much info. to digest there, among help, help groups and cross-linked sites. So I got out the DigitalColor Meter (Mac OS X: App's: Utilities) and measured the banner background (RGB As Hex Value, 8-bit). It turns out to be 996600. However, that's nowhere in the template. Well, back to Blogger Help Center or, better yet, Help Group, I guess.