If you want to install the all blue option for the Charger then follow the instructions. 

Install textures:

Navigate to the vehicle file and search for the YTD, open the YTD in edit mode then simply drag and drop the two textures into it. 
(Doesn't need to be added into the +hi.ytd)


Install the ELS file:
Copy the file(s) inside of the ELS folder then go

Grand Theft Auto V> ELS > Pack_default

If you change the slot(s) the vehicle(s) replace then you may also need to change the name of the ELS file to match the new slot(s)


If you don't change the ELS file then the lights environmental will show as red and blue.