A narrow border
      around the letter would be used as the letter. A wide border around the letter that
      fills in the inner details of the letters acts as a halo and would be considered background. Note 6 WCAG conformance should be evaluated for color pairs specified in the content that
      an author would expect to appear adjacent in typical presentation. Authors need not
      consider unusual presentations, such as color changes made by the user agent, except
      where caused by authors' code. correct reading sequence any sequence where words and paragraphs are presented in an order that does not change
      the meaning of the content CSS pixel visual angle of about 0.0213 degrees A CSS pixel is the canonical unit of measure for all lengths and measurements in CSS.
      This unit is density-independent, and distinct from actual hardware pixels present
      in a display.