If you are running Windows Vista, 7 or 8, you can easily change the color of Sticky Notes by right-clicking on Sticky Notes and selecting any color from the options. You can choose from six different colors: Blue, Green, Pink, Purple, White, and Yellow.
How to Change the Color of Sticky Notes in Windows 10?
1. Once you have launched the Sticky Notes from Windows 10, you will see 3-dots on right side top corner.
2. Now all the six colors (Blue, Green, Pink, Purple, White, and Yellow) will be visible on the top of the screen, in the different circle.
3. Click any color which you would like to use in your Sticky Notes of Windows 10.