They started off as various colours, but they're quite a few years old now (container grown), and there are now more blue than whites, yellow, reds, pinks, purples and bi-colours. Although classed as perennials, they do have a tendency to die after a number of years. The blues seem to live the longest.
The variety I grew from seed is Russell Lupin Mixed, named after the English horticulturist, George Russell, who developed them in the 1930s.
I may sow another lot this year to grow in the ground in my new garden.