code: private void step_1() {
  
          final String markdown = "# Hello!\n\nA paragraph?\n\nIt should be!";
  
          final Markwon markwon = Markwon.builder(this)
                  .usePlugin(new AbstractMarkwonPlugin() {
                      @Override
                      public void configureSpansFactory(@NonNull MarkwonSpansFactory.Builder builder) {
                          builder.setFactory(Paragraph.class, (configuration, props) ->
                                  new ForegroundColorSpan(Color.GREEN));
                      }
                  })
                  .build();
  
          markwon.setMarkdown(textView, markdown);
      }
docs: In order to apply paragraph spans a custom plugin should be created (CorePlugin will take care
  of everything else).
  <p>
  Please note that when a plugin is registered and it <em>depends</em> on CorePlugin, there is no
  need to explicitly specify it. By default all plugins that extend AbstractMarkwonPlugin do declare
  it\'s dependency on CorePlugin ({@link MarkwonPlugin#priority()}).
  <p>
  Order in which plugins are specified to the builder is of little importance as long as each
  plugin clearly states what dependencies it has