I am working on a arch viz project where I need to change the hue of certain mesh(furniture) in rendered images. I came across cryptomatte which will be useful to edit the color values of the need meshes only. But the problem is I needed the color value to be customizable by the user. It will be really helpful if the cryptomatte information available outside the blender application where user can edit the color value of the furniture when interaction with the rendered image through a webpage . Thank you for checking this.