Dear Sofia,
I think silver is more beautiful than gold: I think a girl with silver jewellery looks by far better than a girl with gold jewellery. Throughout history, silver played a more important role than gold. "Argent" means silver, and also money: most of the time, silver and money have been equivalent. Silver made Athen rich, silver was imported from the new world to the old world, being more important than the gold of the Inkas. But as a symbol of wealth, gold is well established. And it is not always yellow, sometimes it is white, sometimes it is red. But white is associated with silver, red with bronze (or with copper, although copper is most of the time connected with a beautiful green). It is a similair problem as with the sea: the sea, most of the time, is grey; it can also be green or orange or black or white. But what color is associated with the sea? Blue, of course. So the yellow-page shall be dedicated to gold, or to a way of getting rich, or to commercials, and the blue-page shall be dedicated to the sea, or to the beach, or to the sand on the beach.
A color has a symbolic value: yellow, the jalousy, green, the hope, and so on. And also a psychological value: violet, the imagination, blue, the calm, orange, the energy. And a heraldic meaning: red, communism, green, islam. I tried to avoid those kinds of meaning, but it's not easy (and not necessairy) to draw the line. A Barbie doll is often dressed in pink. So is pink a symbolic color, or a physical color?
Gold is a Proteus that can change into everything, so it should be without color, colorless, like glass perhaps. But colorlessness is difficult to draw. Gold can change into gauda.

Yours,
John