How to set a transparent header
1. Navigate to Theme Options > Header and set a color for the Header Background Color field. Any color is fine, but it’s required to populate this field.
2. In the Header Transparency field, put 0.
The Transparency field accepts values from 0 – 1. “0“ is fully transparent, while “1” is fully opaque. For a semi-transparent header, enter “0.5.”
If your header hasn’t changed, check the settings on your page, under the section Theme Header. See theme settings.