Thanks for the advice! Chad sent me a link to paintref.com, but that seems easier if I had a specific car's shade in mind-- do you have any recommendations for ways to approach that site, or other places where I can just see photos of different colors in maybe some sort of gradient spectrum?
And I guess the second part of the question is-- how do I estimate what halfway to a color is, or is that just a skill that comes with time? Let's say I wanted to end up with McLaren Belize blue -- if I was playing on a computer I'd start with the color I wanted to get the correct mix of hues and then just desaturate it and/or maybe increase the brightness. I'm almost kind of overwhelmed with choice at this point and any recommendation on how to move in choosing a correct shade to get the color I want is very appreciated (One thing I've considered is the fact that my first attempt with HoK teal I found slightly too green, so maybe if I just started with a very light blue base, they'd even out? Or it might be safer to just mix blue into the teal to get the exact color I want rather than messing with the balance.)