Iron Horse Bicycles was a manufacturer of bicycles, in Islandia, New York, United States from 1987 to 2009. Its logo was a prancing horse on a mustard-color crest similar to the Ferrari logo. Iron Horse sold racing bikes and mountain bikes, but mainly downhill, freeride, and all mountain.
Iron Horse Bicycles logo is yellow.
Mustard-colored is a type of yellow.  I think it as hard because the word yellow is not included in the original statement.