Consider adding Color to any 'Green' landscape, simply by adding perennials.
You will be amazed at the variety and the colors available in this under utilized category of plants.
Yellow flowers alone come in a multitude of varieties, notice the flower types.
This is Lantana which performs well in direct sun light.
Try this one 'Yucca Color Guard' a fantastic Focal point of interest. From a project in
Prosper, TX.