When the luminance value of a particular background color falls below a threshold value – that is, if your background is sufficiently dark – black pens will be shown as white on your ARCHICAD screen. (This is useful if you use a dark or black background to imitate AutoCAD methods.)
However, when printed, pen colors will print according to their actual settings in the pen set.
Non-black pens that would be difficult to see against a particular background will automatically shift to a similar, but more easily visible color. On a white background, elements in white pens are adjusted to a light gray to enhance visibility. Again, when printed, pen colors will print according to their actual settings in the pen set.
See On-Screen Options.