How do I make sprites copy colours off each other?

I'm currently making a project in block code, but I'm currently having an issue with setting one object's colour to another object's colour. For example, if you wanted to set Sprite_1's opacity to Sprite_2's opacity, you'd use a line of code like:

(Sprite_1) Set opacity to Sprite_2.Opacity

However, there aren't any object variables for red, green or blue that I know of, so I can't do a line of code like:

(Sprite_1) Set colour to rgbEx(Sprite_2.r, Sprite_2.g, Sprite_2.b)

So, is there a way to make a line of code work like the ideal above?

Sprite set color to Sprite2.ColorValue

It's the same color that you can change in sprite properties. Not the color of the image.

You can bring the value of color to instance variables.

Then apply the value of instance vars to other sprite's color.

Thanks for both solutions!