Finishes and colors are developed by thousands of different manufacturers for countless millions of products. Every manufacturer selects their colors based on their perception of market need and design trends. There is no “standard” and variation between brands is expected – every manufacturer has their own take on what the right color should be. This holds true for things like cars, paint, nail polish – you cant do nine nails with one brand of “red” and expect another brand of “red” to match.
Manufacturers do not consult each other on color choice. A Delta faucet color will not match a Kohler faucet color. In fact, Delta refers to their GOLD products as “Champagne Bronze” while Kohler has “Vibrant Brushed Moderne Brass.”