Titanium anodizing involves and electro-chemical process to create a layer of oxidation with a specific structure; each specific oxidation structure refracts light differently, appearing as different colors.

Titanium anodizing  is a complete different process than aluminum anodizing which uses a dye to color the material.

Reference swatches for standard anodizing colors are shown below, and each color is offered in a bright/brushed or matte/etched version. Please note that colors are for reference only — it is not possible to accurately depict anodized metal on a screen.