Color studies: Making One Hue Look Like Two

Here are my attempts at making one color, the small inner square in the pictures above, look like two different colors, based on a difference in hue alone. I don't think I was very successful. In the top one, the left square looks redder than the right one. In the second example, the right small square looks duller than the left, but I'm not sure there's a hue difference. Okay, now that I look back, the right one looks orangier. In the third one, the right small square looks more blue-green, while the left one looks yellower. In the fourth one, I do think the two blues look different, the left one redder, the right greener. Last night, the last example looked really good to me, but now I don't see much difference.

Now on to doing the same thing with saturation, and then the last exercise is using all three: value, hue, and saturation.