I don't know about "correct" but I've hacked a library together that allows test input without too much of a burden.
Sure you will come up with something better but might get some ideas from this.
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More power to you!
I tried to group the colors together but the names just don't convey the colors I expect.
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yetneverdone really doesn't appreciate how much effort went in to your file.
My only interest is the opposite of yours - I really don't know the names of the various colors.
Some of the names really don't bring to mind the color.
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As I expected - my bad.
I overwrote the function in a library.

Is it just me or is the WIKI backward? It only seems to work for me if the arguments are reversed???

Just another simple Shader.
Splits a colored image into separate R,G,B images.

Maybe something like this? PointInBox = function( point, box ) local x, y, w, h = unpack( box ) local px, py = point[1], point[2] if px>=x and px<=x+w and py>=y and py<=y+h then return true end return false end touch = function( box ) local mx, my = love.mouse.getPosition( ) if love.mouse.isDown( 1 ...

This might give you some ideas.
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Maybe something like this in reverse?
(Very old code so don't know how good it is)

Pgimeno obviously has a better understanding of what you want to accomplish. From your initial post I could see how you could accomplish what you asked using ox and oy and applying an offset to the x and y coordinates. For the life of me, I can't visualize exactly how you want the mechanics to work ...