When the f_color_<component>_mult are not defined in the input file, use 1.0 by default. When the f_color_<component>_add are not defined in the input file, use 0.0 by default.
The factors are saved as 8.8 fixed values (divide by 256 to obtain a proper floating point value). Note that the values are limited to a signed 16 bits value. This allows for any value between -128.0 and +127.98828.
When the resulting color is defined, the multiplication is applied first as in: