I’ll throw this out there…..I have seen quite a number of Gios frames over the years in their original paint. I have to conclude that “Gios Blue” is not a single color but a range. There is no question that the red primer is an important factor in giving the distinct hue, but the end result varies a bit from there. So, my opinion is that there is a bit of a range, but I know what Gios blue is not.