Hey there! I totally get the frustration of hunting for a feature that feels like it should be straightforward—let’s clear this up for you.

First off: AsciiDoctor doesn’t have native syntax for directly setting table border colors in its core markup. This is by design, since AsciiDoctor prioritizes separating content semantics from presentation details. But don’t worry—you absolutely can customize border colors, you just need to work with the output format you’re targeting (HTML or PDF).

Here’s how to do it for the two most common use cases:

For HTML Output #

You’ll use custom CSS to style your tables. Here’s a step-by-step approach:

1. Add a custom class to your table in AsciiDoctor:

   [.colored-border-table]
   |===
   | Column 1 | Column 2
   | Data 1   | Data 2
   |===
   

2. Create a CSS file (e.g., custom-styles.css) with rules to target your table’s borders:

   .colored-border-table {
     border-collapse: collapse;
   }
   .colored-border-table th, .colored-border-table td {
     border: 1px solid #2ecc71; /* Green border color */
   }
   /* Optional: Style the outer table border separately */
   .colored-border-table {
     border: 2px solid #e74c3c; /* Red outer border */
   }
   

3. Link the CSS file in your AsciiDoctor document’s header:

   :stylesheet: custom-styles.css
   

For PDF Output (Using Asciidoctor-PDF) #

You’ll need to create a custom theme YAML file to override default table styles:

1. Create a theme file (e.g., custom-pdf-theme.yml) with border color settings:

   table:
     border-color: #3498db # Blue outer border
     cell:
       border-color: #95a5a6 # Gray cell borders
   

2. When compiling your document, reference the theme with the -a flag:

   asciidoctor-pdf -a pdf-theme=custom-pdf-theme.yml your-document.adoc
   

The key takeaway is that while you can’t set border colors directly in the AsciiDoctor table markup itself, you have full control over styling via the output format’s native tools (CSS for HTML, themes for PDF).

内容的提问来源于stack exchange，提问作者Tar