This is the wild species which is usually blue, with nodding 'bonnet' like flowers, hence the common name 'Grannie's Bonnets' but many purple, mauve, pink and white colour variants have developed during it's long history in cultivation. It grows very well combined with Euphorbia and Tulips for late spring colour and is easy to grow.
Aquilegias self-seed freely if the stems are not cut down after flowering, they are quite promiscuous plants that hybridise well. If there are other Aquilegias in the garden or nearby, it is very likely that the next generation of plants will vary in colour.