How to make this material with Voronoi texture in blender with the same color

Question

How to make this material with Voronoi texture in blender with the same color

Answer 1

I would do this by combining two Voronoi Texture nodes, one set to F1 and Euclidean from which I take the Color output. The other I set to Distance to Edge and use the only available output, Distance.

To make them both match each other, I plug an external Value node into their Scale inputs to change them at the same time. I also set them to 4D, this way I can use another Value node to change the seed of the texture if I don't like the pattern.

The Distance to Edge I plug into a Color Ramp set to Constant, this way I can control how large the black areas between the colored pieces are.

Then I multiply the two with each other - the result are greyscale tiles with black gaps. This I plug in another Color Ramp node to give the greyscale values colors (starting with black to the left to keep the gaps black). For the texture coordinates I mix in a bit of a Noise Texture to make the edges of the Voronoi pattern more random by using a Mix Color node set to Linear Light and just a very small mix factor so that it's not too crazy.

I just made some similar colors to your reference, you can probably do better and by mixing with other noise etc. you could achieve not so homogenous colors - this is just to give you a basic idea.

This is the nodetree:

And this is the result:

Optionally you can also use the pattern to drive the roughness and maybe a Bump node like I did in the next example, however your reference image looks like the surface is quite smooth so you can probably get away with my above setup.