If an article, file, template, category, module, or other page does not meet the guideline for the use of colours, add this to the top of the page:

{{overcoloured}}

Alternatively, if the problem only affects one section of the page, add this to the top of the relevant section:

{{overcoloured|section}}

• If the page is written in United States English, add the |US=yes option to spell "colour" as "color" for WP:ENGVAR compliance. Calling the template as {{overcolored}} does this automatically.
• This template takes an optional parameter that replaces the word "article" in the displayed message with arbitrary text. For example, {{Overcoloured|section}} displays "This section may overuse colour..." and {{Overcoloured|template}} displays "This template may overuse colour..."
• This template takes the optional parameter |reason=, which can be used to explain what issues need to be addressed, e.g. |reason=The contrast of some of the colors used in this timeline is not high enough to be read easily by almost anyone.

This template adds articles, files, templates, and categories to Category:Wikipedia pages with colour accessibility problems.

• {{Cleanup colors}}