https://jonclayden.r-universe.dev/shadeshttps://jonclayden.r-universe.dev/api/packages/shadeshttps://jonclayden.r-universe.dev/shades/shades.pdfhttps://jonclayden.r-universe.dev/shades/doc/manual.htmlhttps://jonclayden.r-universe.dev/shades/NEWShttps://jonclayden.r-universe.dev/shades/NEWS.txthttps://jonclayden.r-universe.dev/shades/citationhttps://jonclayden.r-universe.dev/shades/citation.txthttps://jonclayden.r-universe.dev/shades/citation.cff