Slightly off-white with no defects. These were taken on a bright white kitchen table, so please keep that in mind. The back cover is #300. I used the last photo I had to show the biggest defect from all four books- a little roughness around the staple of 299. Number 298 has a little bit too, but to a lesser degree.
The item "Todd McFarlane set of AMAZING SPIDERMAN #'s 298, 299, 300, and 301! High Grade" is in sale since Thursday, December 14, 2017. This item is in the category "Collectibles\Comics\Copper Age (1984-1991)\Superhero\Spider-Man". The seller is "electricmonkey44" and is located in Lawrence, Kansas. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Russian federation, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica.