In addition to other perennial plantings, you could try some daffodils for spring color. There are several with 'Blaze' in the name and at least one just 'Blaze'. eg. Valley Blaze, Desert Blaze, Golden Blaze. I'm sure you could find one or possibly several that would fit your need.
Plant them before you put in your perennials and they'll bloom nicely in the spring. For me, daffodils last much longer if they're in the shade.