There needs to be a feature where we can enter hexadecimal codes to get exactly accurate colours in livery designer. This would open up the designer to making ultra realistic liveries and be useful for copying colours
If I remember correctly in one of the streams it was stated that the next update of the designer will add exactely that function. From the roadmap: Upcoming [Upgrade] Livery Designer additional functionality
In one of the TSW 2 live streams, Matt said hex code will be part of the "extra functionality" along with an official mirror option.