Get the '13 Launch Edition and you get Viper GTS Blue,.
I'm not being picky, but that's "Viper GTS '
Pearl' blue". Look at the Viper SRT 10, you can get "Viper GTS blue" which looks different to the Pearl version. However, I bought one and you can't get the paint chip, so the GTS pearl is the only available Viper blue. Also on the Launch Edition, if I remember correctly, it says "Viper '
Bright' pearl blue", is it brighter? This paint chip is also unavailable, and I'm pretty sure you meant the ordinary SRT '13 Viper as the Launch Edition only has that colour and you can't get it's paint chip.
To put it simply:
Viper GTS Blue - Unavailable Chip (From SRT 10 Viper)
Viper GTS Pearl Blue - Available Chip (From SRT '13 Viper)
Viper GTS Bright Pearl Blue - Unavailable Chip (From SRT '13 Viper launch edition)
I haven't checked if there's a difference between the Pearl and the Bright pearl blue, or they were just named that way for differentiating between the Normal and Launch Edition, as the Launch edition's blue has white stripes, whereas the normal one has no white Stripes when picking Blue. You'll have to use your eyes to see for yourself.