I am pretty sure that you will find Niagara Blue will have a much greener tint than what is showing in the picture....at least on my computer. I think there is a slight color shift in the photo from what is actually on the car which probably is Niagara Blue.
One of my first Model A rebuilds was a 1928 roadster. I painted it Niagara Blue Light. I picked the paint color by name from a list of 1928 colors without seeing a color chip and was really disappointed when I saw the actual color, more green than blue.