That bright yellow background imprinted my eyes for 5 minutes, there's other way to leave an impression than fucking up with my senses, like writing a clear concise article instead of a never ending list of examples interrupted with distracting fake mouse move.
I quite like the yellow. You should try and use your brightness slider, because it is not brighter than most real world yellow (i.e. illuminated by the sun which is orders of magnitude brighter than your screen)
Unless you are adapted to live in a darkened cave, that is.
Not saying your opinion is wrong, but for some reason I found myself consciously liking the yellow a lot, which is rare for an article background color for me
An horrible web experience through and through.