Use a decoration or accent colour for all widgets

I want to tint all my UI widgets like sliders, checkboxes etc with a color.
I define my colour (maybe I save it in the pickers theme) and apply it to all my widgets.
Now I want to change that colour.
Am I right that I have to manually select all widgets again and apply the new colour by hand?
Is there no way to “link” or “refer” to a global decoration colour?
(As long as I can´t link or refer to a color in the colourpickers theme, it does not make very much sense to me.)