As the flowers age, they change from dark blue/purple to white.
This plant will have three different colors of flowers at one time. That's how it gets it's common name.
Upclose view of the blooms in action
A pic sent to me by my one of my best customers - growing in her garden - Kiss Me Quick, Glenda !
Blooms for weeks, starting out blue and turning white after a few days.
Planted with only late afternoon sun