Dynamic color change

In the image settings (and not only), there is a color change, including dynamic.
But in the image on the right, the color is only applied to the image from color #1. And when you change color #2, the color of the image on the right does not change, which is not convenient, although I noticed that if you click on the image, the color will change to the set one

The 1.7.3 has new feature ‘color preview’ that shows the color you are editing regardless of the gauge state. To activate the color preview, select the color component to edit and drag up-down on preview pane to see the color you are currently editing.

I’ll try, thank you