Generate a Dictionary with complimentary range of colors for the given input Color, itself included.

Just copy ColorPalette.gd into the Godot project folder where you wish to use it.

Once you have copied the file, to generate a palette of colors based on a main color you provide:

#Test with a random color

var MyColor 	:Color 		= Color(randf(),randf(),randf())
var MyPalette	:Dictionary	= ColorPalette.new().Generate(MyColor)

MyPalette now contains a Dictionary with complimentary colors.

To access a specific color in the Dictionary:

#Look at the script for the string labels used to name the colors; change them to suit your preferences

var NeutralColor = MyPalette["Neutral"] #Assigns the neutral color to variable NeutralColor

To iterate through the Dictionary (Please note: To test the code below you will need a Node that implements the _draw() method such as Node2d):

func _draw():
	var TextSize := 32
	var font = Label.new().get_theme_font("") #Hacky quick way to get a default font

	#Test with a random color
	var MyColor 	:Color 		= Color(randf(),randf(),randf())
	var MyPalette	:Dictionary	= ColorPalette.new().Generate(MyColor)

	var position = Vector2.ZERO

	for ColorName in MyPalette:
		position.y += TextSize + TextSize
		draw_string(font,position,ColorName,-1,-1,TextSize,MyPalette[ColorName])

This will output the current color text strings in their current color.

You should change the labels in the script to whatever suits you best.

You should also play with the values, especially for the "Adjacent" colors.

This is pretty straightforward but njamster on mastodon.gamedev.place was asking me to open source it so here it is. I hope it is useful for someone.