Something to remember with anodizing, in case you aren’t aware. The color is determined by the chemical make-up of the liquid in the tank, the time that it spends in the tank, and the alloy+heat treatment of the aluminum.
A 60 minute clear on 6063-T6 vs 5052 will be vastly different.
Some softer alloys 2000 and 3000 series, for example, can’t even come close to the same as what a 5000 or 6000 series alloy can, in terms of color. We tried dark bronze anodizing some soft alloy and the closest they could get was dark grey… Another challenge: welded aluminum. Welding adds heat, which alters the heat treatment, which alters the color. Sometimes it’s a neat result, but usually it’s just black or chalky white.