Colored Rubber O Rings Colored rubber o rings are used to easily and visually identify the type of part being used. We can supply any O-ring in any color. Sanshi Rubber specializes in the production of colored rubber o rings. we are able to produce rubber o rings in almost any color. we do have a list of colors in stock and we often mold common materials such as NBR, and FKM for these colors. this creates a shorter lead time, lower cost and minimum for these colors compared to fully customized colors. lower costs and minimums. Contact us to indicate your specifications for the color and material of the colored rubber o rings. Colors of colored rubber o rings **Colored rubber o rings can come in a variety of colors. These are the standard colors of materials based on the industry, and Sanshi Rubber can provide o-rings in any color for any material. Below are the colors of colored rubber o rings and the most common materials associated with each color.