As a Dutchman myself, who has stolen his fair share of traffic lights (who hasn't): still only what we call it because of the traffic-light-ness, if you had to

As a Dutchman myself, who has stolen his fair share of traffic lights (who hasn't): still only what we call it because of the traffic-light-ness, if you had to write down the actual colour used, or had to point at it on a colour wheel, we'd pick "orange-yellow".