How to "sort" colors of a particular hue

So if I use randomColor to generate a pretty random variation of "green", I get this for example:

This is a bit chaotic for my liking, I would instead like to get a list of green colors that have some sort of order or sorting to them. That look like they flow into each other. Something more like this:

The question is what principles are being used to sort the colors in that way. I would like to know how I could go about building a grid of colors that would look more pleasant than a random assortment of colors of a specific hue.

The code I used is simply this:

var randomColor = require('randomcolor')

var input = process.argv[2]
var colors = randomColor({
  count: 20,
  hue: input
})

If it makes a difference, I would like to be able to specify the number of rows and columns to divide the colors into as well. Any language or pseudocode would be fine to figure this out, but seeing it in JavaScript, especially if it involves bit manipulation like bitshifts, would be helpful but not necessary.