> For the complete documentation index, see [llms.txt](https://bnpr.gitbook.io/bnpr/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bnpr.gitbook.io/bnpr/outline/black-outline.md).

# Black outline

Unless your style demands it, **never** use `#000000` **BLACK** color as a outline color. Not only a black line aesthetically boring, black outline is:

1. uninspiring
2. not thoughtful
3. too high contrast when the scene is bright
4. too low contrast when the scene is dark

{% hint style="info" %}

### The function of an outline

1. provide separation between subject from the background
2. provide a hint to the type of material the line is on
3. with line style (on Freestyle), line provides style & the emotional state of the artwork
   {% endhint %}

![With black outline, monkey looks harsh and generic](/files/-MLVCcMLfWRbNlht4juM)

![without black outline, monkey looks softer and hinting on the object's material](/files/-MLVCmf5uvBzHeHz4HU7)


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://bnpr.gitbook.io/bnpr/outline/black-outline.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
