Cultivars
'Atropurpureum'
This mat forming plant has green leaves with a red margin and in sunny or dry conditions the leaves become reddish. 

'Purpurteppich' syn. 'Purple Carpet'
This compact form has deep purple leaves and dark purplish red flowers.

'Schorbuser Blut', syn. 'Dragon's Blood'
This plant has green leaves with a purple tint and produces deep pink to magenta coloured flowers.

'Tricolor'
This plant has reddish margined leaves and forms a thick mat habit.