History

That page couldn't be found

To comply with WCAG AA, the colour of text must sufficiently contrast with
its background color, so that people with moderate visual impairments can read it.

The [contrast ratio](https://www.w3.org/TR/UNDERSTANDING-WCAG20/visual-audio-contrast-contrast.html#contrast-ratiodef) 
must be at least 4.5:1 for body text, and 3:1 for large text.

A much more demanding version of this check (1.4.6) exists for WCAG AAA. Ignoring an issue in this check 
will also ignore it in that check, and vice versa.

	Title / URL	Issues
	Historywww.riotinto.com/en/about/history	99
	That page couldn't be foundwww.riotinto.com/en/404	1

Ensure text has sufficient contrast (AA)

Rio Tinto Group

Where this issue has occurred