**Acceptance criteria**

On the admin/design page:

* Tab **Interface**: 

* Within the dialog to change a color, the new color picker field is used

* Tab **Default colors:**

* Begin of the deletion Editing a color is harmonized with the UX of the interface tab. 

* Instead of opening the edit in a new page, a dialog is opened

* End of the deletion A color picker is used for the hex value Begin of the insertionbothEnd of the insertion Begin of the deletion

* The creation will also be doneEnd of the deletion in Begin of the insertioncreating and editing colorEnd of the insertion Begin of the deletion a dialog.End of the deletion