Customize Your 2025 Calendar With Colors And Fonts Windows 10. Windows 10 includes a bunch of personalization settings that let you change your desktop background, windows colors, lock screen background, and more. You can change accent color and chose dark or light theme and pictures in windows 10 calendar app

You can change the color of your calendar events, however, these settings will change the color for all the events that you have created for that account. Learn how to customize windows 10 with these powerful tweak tools!