**As** a user on OpenProject
**I want to** be able to configure the Interface color mode to automatically sync with my Operating System
**such that** when my OS preference is dark, OpenProject adapts the "Dark" color mode And when it's "light" it adapts the "Light" color mode
**And** I also want to be able to specify Contrast options for the color modes
**so that** the color contrast mode is selected if I prefer the High Contrast modes

**Acceptance criteria**

* When I navigate to "Account Settings" →  "Interface" → "Color mode", a new option Begin of the insertion**"Automatic (match OS colour mode)"**End of the insertion Begin of the deletion **"Auto (system default)"**End of the deletion should be available

* When I select the "Auto (system default)" and change my OS theme to "light" mode, then OpenProject automatically switches the theme to "light" mode (vv Dark mode)

* Begin of the insertionWhen automaticEnd of the insertion Begin of the deletion If I have selected an "Increase contrast"End of the deletion mode Begin of the deletion on "Light mode" And the current OS themeEnd of the deletion is Begin of the insertionselected, add a checkbox:

* Label: **Use high-contrast when in Light mode**

* Caption: "UsesEnd of the insertion Begin of the deletion "light" thenEnd of the deletion the Begin of the insertionhigh-contrast version of Light mode when automatic color mode is selected.End of the insertion Begin of the deletion "LightEnd of the deletion High Begin of the insertioncontrast is not available yet in dark mode."

* Enabling this will force high-contrastEnd of the insertion Begin of the deletion Contrast"End of the deletion mode Begin of the insertionwhen light mode is active (in Automatic mode).


End of the insertion Begin of the deletion should be selected


End of the deletion **Permissions and visibility considerations**

* This is a User specific preference, so it should be treated as such


**Out of scope**

* Dark High Contrast


_Set the_ **To be informed/consulted teams** _field to include all teams necessary to be informed of the changes._