creo3 config.pro option documentation for: SYSTEM_HIDDEN_COLOR

system_hidden_color
<0.000000 0.000000 0.000000>
Defines the default color for the display of hidden, solid wireframe entities. The three real numbers from 0 M-^S100 specify a percentage of red, green, and blue, respectively, in the resulting color. For example,0 0 49
defines a medium blue.
The system ignores this option if use_part_color_for_hidden_lines
is set to yes
.