Error
On this page you will find different ways in which you can styles your Error page.
Background patterns
Here is one source for background patterns. https://bg.ibelick.com/
You can copy them and modify them as you see fit.
Adding a custom error page
To add a custom error page, you can create a new file in the root of your nuxt app call error.vue. You can learn more about this in the Nuxt documentation.