From FreeSpace Wiki
HUD Configuration File or (more accurately) HUD Color File
Text file containing the RGBA Value for each and every HUD gauge element in the game, and is used to quickly load in a color scheme for the player.
.HCF's are generated by the game from the HUD Configuration screen, but players and developers may make their own as well by placing them in the /data/players directory. (Probably the best way to make a new custom .hcf is to copy an existing .hcf and modify it)
- Syntax: ( String name )
The value set for gauge is currently ignored, and there must be a single +Gauge entry for each gauge element, otherwise the file will fail to parse.
- Syntax: ( Integer Red Integer Green Integer Blue Integer Alpha )
- Valid Values: 0 - 255
Space delimited list of integers that determines the color and transparency of the gauge element