Based on the color blocks on that website, I think those two blue shades are a bit light, Phil. IIRC, the indigo blue is closer to the dark blue stripes but, then again, it's been a while since I was at the HARM and saw the two blue Atlas boats so I could be wrong. Here's a picture I have of the 82 boat, the 77 is visible on the left side of the picture with a scale model of the boat sitting on the trailer. I know lighting can change what colors look in photos so who knows. I found a shot of the 77 boat though, unfortunately, it doesn't really give you much to really see
The 84 Atlas turbine is shown in this video of the Tri-Cities Columbia Cup, for another comparison: