Colour and conspicuity
Runway markings shall be white.
N1.It has been found that, on runway surfaces of light
colour, the conspicuity of white markings can be improved
by outlining them in black.
N2.It is preferable that the risk of uneven friction
characteristics on markings be reduced in so far as
practicable by the use of a suitable kind of paint.
N3.Markings may consist of solid areas or a series of
longitudinal stripes providing an effect equivalent to the
solid areas.