I do not have exact colours for it, but various shades of gold with a touch of crimson and splashes of green, plus clear skies and soft warm weather - and we are there.

J.M.Flowers' explanation seems like a later "rationalization"... but it may be true. Would be funny if this is the real origin of this expression. In any way, I'll remember it! 😊 Now I have something to say to my daughter when she asks me about it.

!BEER
Glad you liked the photo, and thanks for taking the time to respond!