Misc: Per a 1995 poll, 3.9 percent of the women surveyed said they don't wear ------------?

Questions

What color is produced by the complete absorption of light rays?

What color is the tip of a Canada lynx's tail?

What colour on black produces the most visible combination?

What colour would one associate with the Spanish volunteer force on the eastern front in the WWII?

What colourless, odourless light gas is used to lift airships?