You can print them in black and white. A printed mandala will grow stronger over time. They grow faster, if you carry them with you.
If you look at them on your PC / Phone, they will infuse you with their energy, as long, as you look. The printed mandala works 24/7 on you, as long as it’s within 2 feet of you.
Mobile wallpaper version of these mandalas can be found here. Created by @Septimus: