For a brilliant splash of purple, consider 'Sugar Plum' Coral Bells (Heuchera). I have it edging a long border with bluebells and a white evergreen candytuft plant ( don't know name). They soon reproduce themselves too, so are good value.
Outdoor fireplace, tiered landscaping, and curved path. The raw Copper path lights that will patina over time will look great and unique for years to come. Having the low voltage landscape lighting make these backyard ideas picturesque day and night.