“Web pages shall be designed so that all information conveyed with color is also available without color, for example from context or markup.” – §1194.22(c)

Why it matters

Color is commonly used to convey information in electronic documents, enhancing aesthetics and usability for many users. Some, however, have difficulty perceiving color, and certain types of interfaces, especially text-only and monochrome displays cannot access information presented only in color.

EXAMPLE: Red is used to indicate a negative number.
RESOLUTION: Place a minus sign before the number or enclose in parentheses to indicate a negative amount. If the source document cannot be changed alternative text can be added stating the number is negative.

This checkpoint provides a means of checking a PDF page to ensure that color isn’t the only means of conveying the information contained on the page. If color has been used in this way (the simplest example would be the use of red to indicate “prohibited” and green to indicate “approved” without also distinguishing the meaning in some way other than color), then the remediator should Fail the page and notify the author.

What happens when I verify this Checkpoint?

State of Oklahoma regulations note. Sufficient color contrast is required to meet State of OK regulations.

This checkpoint allows the user to compare the page as it appears on a color monitor to how it would appear on a grayscale monitor (CommonLook PDF presents a split-screen view to show color and grayscale views simultaneously).

Synchronized scrolling makes it possible to easily compare the two views.

Checkpoint (c) Color showing example page.

When to Pass or Fail this Checkpoint?

Section 508 1194.22

PassNo information is lost due to the lack of color.
FailIf information is lost due to the lack of color that information is provided in an accessible fashion.
RemediationTypically, return to the author for an improved and accessible design.
Other 
CommentsYou may include comments for any figures marked as Failed. These comments appear in the Results window and final verification report. 

When to Pass or Fail this Checkpoint?

State of Oklahoma Edition

PassNo information is lost due to low color contrast.
FailIf information is lost due to the lack of color or color contrast, that information is otherwise provided in an accessible fashion.
RemediationTypically, return to the author for an improved and accessible design.
Other 
CommentsYou may include comments for any figures marked as Failed. These comments appear in the Results window and final verification report. 

Checkpoint Type

This checkpoint is partially automated. It displays for any page that contains color.

Demonstration

Using the Color checkpoint

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