Cobalt Rings are a brilliant white, right the way through.
Cobalt rings however are completely white through the entire ring, no plating to wear off so the ring will always maintain its white colour in appearance. In addition Cobalt is very resilient to scratching. That's not to say that it is scratch proof and in the unlikely event that you did scratch the ring, the scratch would be the same colour as the ring and not the yellow colour that you may receive with a white gold ring.
In order to show you the inside of a cobalt ring we have pain stakingly cut one open for you to view inside the cobalt ring. Just for your information this took our workshop around 2 hours to make the two cuts needed with a diamond impregnated cutting disc as the cobalt is so tough. In comparison this would have taken less than a minute with a similar platinum ring, or any other precious metal.
You will see that the ends of the ring where cut are completely white. They may be a little duller as we have not polished the ends, but are still completely white in colour.