What does that color zinc dichromate look likelike?
Dichromate is a dye placed over a zinc plated base. Since its a dye it often does not hold up well to exposure and pieces often take on a zinc or sliver look over time.
Zinc dichromate has a goldish tint some times (on larger pieces - like large master cylinder caps) with a multi-hue with green and red shading. Finish often is determined or at least effected by the underlying metal and the process (how much dye and how bright of a zinc finish was applied) Also the finish will loss some of its "shine" over time with exposure to the air and things like cleaners
The alternator fan, pulley and nut in this picture are plated - Zinc dichromate
Fresh Zinc on right - Zinc dichromate on left