The ones that stay a bright yellow for me are the ones that start green bright in the Spring but get brighter yellow in the summer.
Zounds and Pineapple upside down.
I have no idea who this is it came in one of those no name Gilbert Wild ground cover pack of 20 for 20 bucks, a few yrs back. This is what it looks like in July. I really like it. It is always so fresh looking in the summer. I think it is Gold Standard but it was not marked so I cannot be sure.
I am not a plant name tag gardener but when I first started gardening I use to use flat rocks and paint pen and to write the name. Never lost a name tag.