I focused here mostly on picking colours and having a better understanding on how I can select specific areas on the grid to associate with a different colour. I took a bit of a different approach on how to create the grid and have a bit more individualized cells. I also experimented with “random” but only managed to create the noise using my technique. I used contrast of hue and cold warm contrast mostly to visualize this shader and have explored and tried to introduce brightness but had some issues getting it to work. I will further explore that and expand on this post.
Note: I might update this post in the future with more images as I tried exploring things separately since I had some issues trying to understand how to get more of the contrasts within the same shader.