Before revision: "Visible Spectrum Wikipedia Contributors, Wikipedia, The Free Encyclopedia accessed 11/17/2013 available at: Visible spectrum Scholars have noted that what Newton regarded at the time as "blue" would today be regarded as cyan, and what Newton called "indigo" would today be considered blue.
After revision: Scholars have noted that what Newton regarded at the time as "blue" would today be regarded as cyan, and what Newton called "indigo" would today be considered blue.