We’ve known and used custom recovery (TWRP, CWM, etc.) and custom ROMs for long, but not anytime before this we came across custom download mode. But today, Verizon LG G3 got one. Called the PurpleDL, it changes the looks a bit and also supports a nifty utility we know as ADB (thanks to ADBD insecure by chainfire).
PurpleDL is a brain child of developer r3pwn, and if the prospect of using ADB through download mode entices you, which it easily can, while purple color is to your liking too, then give the PurpleDL custom download mode a shot.
In order to install the custom download mode PurpleDL, check out its development page here — it contains links and commands and files that’s you’ll need, and instructions to install the original download mode back, too.