Hi @travelcontest, I'm going to share several, all my own photos.
This first one ↑ Is a Hybrid Petunia (I'm pretty sure) in my niece's garden or deck↑
↓Again on my niece's deck, Impatiens and Marigolds↓
Here at my new home, which is 80 yrs old, the previous owners must have loved yellow,
because I have Daffodils and Crocus and Yellow Jessamine (no pics of those)
And for some Blue (here in my yard) there is this, I called it Mystery Plant, but
I've since been told it is a variety of Vinca, and is fairly invasive.
Well, that is my yellow and blue, I don't know how many is the limit, I have lots of Wisteria as well ha ha ha