I used to have 3 species of purple hot pepper, one already extinct from my garden. One is totally dark purple and has round fruit. The other one has green leaves with a purple vein, has a tinge of purple flower and purple long tapering fruit. Both are red when ripe.
|pepper plant: all purple|
|round fruit and beautiful purple flower|
|scarlet round fruit|
|flower with tinge of purple|
|green leaf with purple vein|