In Minecraft, we have a lot of nice blocks, there's no denying that. But something I've noticed is that Minecraft block colors tend to lean towards the warmer, "cozier" reds, yellows, oranges, and browns, as well as grayscale colors.

Just look at the blocks added in 1.9 and 1.10: we got magma, nether wart, and red nether brick: all noisy red blocks. We got End Bricks and Bone blocks, which are both light yellow-tinted blocks. We did get the new Purpur blocks, which are very desaturated purples, which is nice.

But look: There are no indigo/deep blue building blocks! We have blue wool and lapis, a decorative and a storage block, respectively.

But look: There aren't any magenta/hot pink building blocks

But look: There are two pure green building blocks, both of which are hardened clay!

But look: The only purple blocks are extremely light and desaturated or ridiculously dark (unless you count Blue Stained Clay)!

I think I've gotten my point across. I might make a suggestions post once I have a good idea for what materials could be these colors, but for now it's just a rant.