
I seem to have a bee in my bonnet about a certain very soft autumnal yellow at the moment.
Perhaps it would be easier to capture with tempera painting, or gouache.
This gorgeous piece is by VieModerne, on etsy. 
You might call this more of a pale golden colour, but the colour I have in mind is yellow
just before it becomes golden, if you see what I mean. 
Of course context is always so important, 
and the cool, pale  tint of the background colour of this photo really enhances the delicate colour 
of the chiffon petals.
Let me know if you see a magical  yellow on your travels,  and in the meantime I'll try to find other examples!