fastboot boot TWRP.img Not working
There are different versions of fastboot.exe available. 

One old version I have has the command line option -c as 

-c &lt;cmdline&gt;               override kernel commandline


The recent versions for Android SDK (v29.0.5-5949299) does not has the -c option. Instead it has the option --cmdline which seem to the the exactly same thing:

--cmdline CMDLINE          Override kernel command line.


Therefore you may succeed changing the command-line to

fastboot --cmdline "lge.kcal=0|0|0|x" boot customrecovery.img