I was just going to say eriseyum (sp?) Bowles mauve. I love mine. Year round colour, I only bought them last spring and they’re huge. My garden is shades of purple, pink and white, so thinking of long flowering, and quick growing, I also have lots of geraniums (wargrave pink, rozanne), hydrangeas, roses, lavender (only English, mine are white and purple varieties), campanula, salvia and clematis.
I also have easy to maintain shrubs like escallonia pink Elle (stays small), winter and spring flowering chamelia, buddleia, lilacs, euphorbia and rhododendrons. I find easy climbers to be hydrangea, evergreen jasmine, honeysuckle and having lots of success at the moment with long and repeat flowering climbing roses.
But if you want low maintenance and colour, I would choose just a few things and repeat every few feet, thinking of height and spread. So much easier to think through and maintain as you can do it less often.