Whitepaper: It’s a document usually released prior to the launch of a new cryptocurrency, essentially a whitepaper is a token/coin technical manual and sales brochure combined, outlining its purpose, benefits, features and roadmap. They are a necessary component of any new cryptocurrency to provide more detailed information on the project and offer legitimacy.
Lightpaper: It is a summary version of Whitepaper though rarely used
Yellowpaper: is a document containing research that has not yet been formally accepted or published in an academic journal. It is synonymous to the more widely used term preprint, yellowpaper contain usually more technical details.