Oxalis Triangularis purpurea has purple leaves and purple-y white flowers. Oxalis Triangularis papilionacea has olive-green leaves and pure white flowers. They are both delicate looking ornamental plants, grown indoors or out.
When grown outside they will die down over winter but will stay leafy if grown indoors. Plant in any fertile, well drained soil in containers or hanging baskets. They prefer soil that is enriched with peat or leaf mould and like bright indirect light.
Water moderately and feed during its growing periods but withhold this during dormancy. (They will be each labelled so you know which ones are which)