I work with them constantly. Yes they have a one primary blue. My point is that blue has changed many times over the past 28 years. I had to match each change (often at great expense) in wool, blend, cotton, hyper cool, tactel, iron grid, Melton wool, natural and synthetic materials etc each time. If I don't adjust my product doesn't get approved. Fortunately they have stabilized the branding the past few years and are currently staying with the most recent brand guide you posted in another message.