Quote me precisely mkuu, for the current JF theme, black wont fit, it will be faded.
it is not that always black logo will wipe visitors, site background color is what will matter.
In your previous comment,you didn't mention BG that has a black color,otherwise I wouldn't ask cos I'm well aware about its effect.
all in all,each color has its meaning depending on how someone sees it.
Here is a short meaning of a black color if used in a business logo.
Black
Serious and Sophisticated: Elegance - Seriousness - Exclusivity
Black is seen as a serious, no-frills color, and can evoke a feeling of sophistication.
Although it might look plain, it is often used for luxury products because of its sense of elegance and glamor.
Black can also show consumers that your brand is mysterious and exclusive.
What a Black Logo Says About Your Brand.
If your company has a black logo, you probably aren’t using it to attract attention.
Your company wants to be seen as well-established, with a strong reputation or sense of elegance, and your logo is part of that desire.
source :
www.webpagefx.com/logo-colors/[/black