This Sedum 'Xenox' is in the Southwest Garden "Section D: White Garden" (SWGD11)

"Stonecrop Xenox’s stunning foliage starts out as shades of green in early spring, and darkens as the season progresses to deep purple. Come late summer, gorgeous rose-colored flowers emerge and ignite the late-season garden! Its small size makes it perfect for a border garden or container." -https://www.americanmeadows.com/sedum-xenox