I think this is flawed. You quickly end up on a color that's clearly not "blue" or "green" and you're unlikely to keep hitting "this is green" several times in a row, conceding that ok, fine, maybe this is blue, whatever. You're basically measuring how many times people are willing to click the same button in a row.
Edit: Possible improvements: changing the wording to "this is MORE green" and "this is MORE blue" and randomizing the order in which they are shown, somehow. I realize you're just doing some kind of binary search, narrowing the color range.
This is not to mention color calibration of your monitor, or your eyes adjusting / fatiguing to the bold color over time...
Edit: Possible improvements: changing the wording to "this is MORE green" and "this is MORE blue" and randomizing the order in which they are shown, somehow. I realize you're just doing some kind of binary search, narrowing the color range.
This is not to mention color calibration of your monitor, or your eyes adjusting / fatiguing to the bold color over time...