This option you can find in the installation directory (help documentation) of the software and you can use it for the application while editing your config.pro file.
Category | Description | Values | Default value |
Weld | Defines default weld color. The three decimal values specify (in order) percentage of red, green and blue in the resulting color. For example, 0 0 49 specifies a medium blue. Change in session using Tools>Colors>System. |
| 0.00 0.00 0.00 |