What do you call the design effect of blurring or blending an image with a color and using it as a background at the top of the web page? I’m not doing a very good job of explaining the effect. It would be easier to convey with live demos.
Check the (now outdated) Spectrum WordPress theme here: https://wordpress.org/themes/spectrum (You’ll have to click “Preview”)
It is implemented here with Cineflix’s logo: http://www.cineflixproductions.com/ (You might have to maximize your window to see the edge of the effect).
Perhaps the sexiest implementation of this design effect is Valve software here: http://blog.counter-strike.net/operationpayback/