Here is another wonderful plant that flowers so brightly, Phlomis fruticosa or Jerusalem Sage. It's native to the Mediterranean which means its drought tolerant and does very well in SoCal. It has gray greenish leaves, bright yellow flowers that bloom Spring into Summer and grows to 4 feet. It's likes full sun as most gray leaved plants do.
I think this is a fabulous garden shrub that is underused here. A few years ago I needed several for a job and couldn't find them in any nursery. Now they are available at better garden centers sometimes. The yellow flowers pair great with purple Statice(Limonium perezii). It's a sunny cheerful plant!