Pink Paper
The pink paper is a customization of the white paper to match the DeFiChain color, pink. It is "essentially a live paper, subject to constant change as specifications are added, that will set the overall direction of DeFiChain for the next year [Part I was written on 13 April 2021] and beyond," according to the description in the blog.
This is the original on Github.
Part I
This is the blog entry for Part I, on defichain.com.
Part II
This is the blog entry for Part II, on defichain.com.