Where does it say that? That would be a mistake and we would like to correct it.
This sentence belongs to the "Adjectives" unit, and the tips and notes for this unit correctly mention that "Doq covers colors in the red–orange part of the spectrum". Yellow would be perceived by Klingons as SuD, not Doq.
Accordingly, you can translate Doq qoq as "The robot is red" or "The robot is orange", but not "The robot is yellow".