This is an easy and low maintenance planting combination for full sun gardens in temperate growing zones, zone 8a or warmer.
The strongly upright, strappy foliage in rosy bronze tones is a New Zealand flax. It's likely Phormium 'Sundowner' though other varieties of flax with similar coloring and form would work equally well in this combination. Do keep in mind that phormium should be considered an annual in Pacific Northwest gardens. Though in periods on mild winters they may persist for a number of years, they are always living on borrowed time. If your garden temps periodically dip below 20 degrees or so; enjoy them, but be warned.
The toothy texture and bold blue foliage of honeybush (Melianthus major) lends a touch of the exotic to this planting scheme. This large perennial is semi-evergreen in very mild climates but may die back to the ground in winter in Pacific Northwest gardens. In those situations, even if it it doesn't die all the way back, it will likely look better and more fresh if cut to ground in early spring to make way for fresh foliage.
Stonecrop is wonderful perennial for all-season appeal. In spring the emerging foliage of Sedum spectabile 'Autumn Joy' is succulent and fresh. As the season unfolds, it grows into a beautiful mound of gray blue foliage. By summer its blooms begin their procession of color; from green, to pink, to a rich bronzy-red in fall. The summertime blooms attract pollinators of many kinds from bees to butterflies. At season's end the dried umbrels can be left in place to provide fodder for birds and to provide winter interest and structure.