Truth be told, one of our Site Administrators was experiencing issues with customers not doing what seemed the logical thing and clicking Confirm to finish their order. Imagine that!
To paraphrase his observation, "for some customers you could reach through the screen and smack them on the forehead and still not get their attention." As an alternative to the smacking hand code, he suggested the above change in color as a slightly more constrained approach.
Especially, when we told him the hand coming out of the screen was likely to not work in Fire Fox. Due to the more protective nature of that browser's coding.
Since we use the "Green" color convention to highlight, Include & Start Project, it seemed like the natural choice.
