Once your preferred color theme is set, you can also choose an accent color that will appear on icons, tiles, and other screen elements. The preview image shows how your changes will appear, and changes are made live so you can sample each combination. Play around with the different color options to see which scheme you prefer. Toggling Transparency effects controls the transparency of certain windows and the taskbar, but by turning it off you may be able to darken up certain areas. For example, you can choose to put the Start Menu and taskbar in dark mode, but keep default apps under the default light theme. You can also decide to choose Custom if you want to mix and match color themes. Dark (and Light) mode change the look of the Windows Start menu and built-in apps. To enable dark mode, navigate to Settings > Personalization > Colors, then open the drop-down menu for 'Choose your color' and pick Dark.
