eta:
You might want to check out a color wheel - just Google, there are a ton out there. Here's one I picked at random.
http://www.worqx.com/color/color_wheel.htm or here
http://www.tigercolor.com/color-lab/...tm#Color_Wheel
If you start with the yellow and turquoise, it's interesting to see that fuschia could be the 3rd player in triangle.
Or a green, if you went with analogous colors.
And we're not talking huge amounts. Even if you bordered each block with a 1.5" strip, and then trimmed them down to the same size, you could now sash them if you wanted with the print fabric to build up the quilt size, but that little zing would add so much to the quilt.
Of course, you don't have to do anything. But it's an interesting exercise to see how you can make a sampler quilt not look like a sampler quilt.