Veilige kleuren voor dienstauto's van de P.T.T. (Safe colours for service vehicles of the Dutch Post, Telephone and Telegraph.)

Conspicuity in the road traffic situation has been determined for eleven colour samples. This determination is based on the consideration that conspicuity, and therefore the safety of a colour depend on the colour- and brightness contrast with the average roadway scene. The saturated colours orange DAF208 and (orange) red DAF207 are the most conspicuous ones, immediately followed by other yellow-orange-red hues. The more dull yellow AC323 scores as one of the least, which accentuates the fact that not all yellows have equal conspicuity. Although the green colours still have a reasonable conspicuity, they nevertheless score with the least of the studied samples. Grey is very inconspicuous. (Author/publisher)