Windows 10: custom color from backround pic

I have forgotten how to do this.
Create a custom color from say a marble background picture.
as an example:





:)

 

change web backround color

how do i change web backround color

 

Custom Start Menu Color

Is there a way to select a custom color for the start menu, task bar, and the like.

The colors listed all suck.

 

Start Menu background color customize

Hi,

You can change the background color of the the Start menu on Settings. To do this, follow the steps below:

• Click the Windows logo (Start button).
• Click the gear icon (Settings).
• Choose Personalization.
• Select Colors.
• Under Show color on Start, taskbar, and action center, switch the slider to
  On.
• After switching the slider to On, you can now pick what color you want or you can click the
  Automatically pick an accent color from my background checkbox to make Windows pick the color that complements the color of your desktop background.

Kindly share with us the result after you perform the steps above.