I just received some dozen cube boxes of master sky blue chalk. I figured hence the name, the lighter blue color might blend in better on our tournament blue Simonis cloth. I hardly see any difference when I put two new pieces of chalk next to each other - one blue and one sky blue, with the sky blue actually appearing a shade darker. We’ll try it out and see if there’s any difference how the chalk marks look on the cloth, and I’ll report back. Anyone else have any feedback on the differences they’ve experienced?