I am using the package `xcolor` with the option `dvipsnames` to have access to predefined colors listed in the page :
[The 68 standard colors known to dvips](https://en.wikibooks.org/wiki/LaTeX/Colors)

I would like to get the RGB codes of all these colors (Periwinkle,RoyalBlue,PineGreen...) and I didn't find a table for such correspondances.
How can I get it ?