Comment on WordPress Header Images by SEO Dave.
Might be the header images, some are grey.
There’s a tutorial at Stallion Header Image Options.
Try setting “Header Image Off” under “Stallion >> Colour Options”
If that removes the grey turn it back on and play around with the “Header Image” setting below (or keep it off if you don’t want a header image at all), there’s over 20 images available with Stallion and you can upload your own.
There’s no built in ability to change the font colours for a particular colour scheme, would require editing css files, which one depends on the colour scheme you are using.
LMK when it’s working again and I’ll take a look.