From Nookipedia, the Animal Crossing wiki
The colors of this userbox may be customized:
Replace the appropriate fields with the desired color. If you don't want to change one of the colors, use its default, which is listed below next to the field.
- border (#006400)- the border around the userbox
- imagebg (#A5D97B)- the background behind the Nookipedia logo
- textbg (#78AB46)- the color behind the text
- text (#000000)- the color of the text