o thats ez pz with the bluelines plugin just use one of the customcolors.cs and set the lines u want to be black to (location,0,0,0) - aka 0 RGB
idk if i made that clear when i released it but changing the 'bluelines' to any color u want is super easy even ingame
bluelines.dll has a command called groovcolor(location,r,g,b); with 11 target locations that are the different sets of lines - in the .zip i included 2 examples - yellow and red - with descriptions of the 11 sets of lines. to try one out just rename red_customcolors.cs to just customcolors.cs
Blulines loads a default set of my 'blue' settings on init but will then try to load customcolors.cs from /Modules to override those settings (if the file exists - if not, the blue defaults will stick)
(using the win8 pluginfix .exe it tries to load customcolors.cs too soon and always fails so you might need to add .acs.cs to the filename to get it to load normally)