Pink - you can read all about it here and decide:
http://en.wikipedia.org/wiki/Marmite
The main ingredients of Marmite manufactured in the UK are yeast extract, with lesser quantities of sodium chloride (common salt), vegetable extract, niacin, thiamine, spice extracts, riboflavin, folic acid, and celery extracts, although the precise composition is a trade secret. By 1912, the discovery of vitamins was a boost for Marmite, as the spread is a rich source of the vitamin B complex; vitamin B12 is not naturally found in yeast extract, but is added to Marmite during manufacture.