Future Media Standards & Guidelines

Colour contrast

All colour combinations must pass the WCAG 2.0 AA-compliant colour contrast check in accordance with the Snook colour contrast checker.

This is a ratio of 4.5:1 for text 18pt or less in size, and 3:1 for text larger than 18pt or text that is bold and larger than 14pt.

Where it cannot be adapted, stylised text used in pre-existing broadcast logos and branding is exempt from this requirement.

Rationale

If there is sufficient contrast between foreground and background colours, particularly between text and its background but also applicable to the keys of graphs and similar, then users with moderately low vision or with colour deficiencies that affect contrast to a minor degree are more likely to be able to access BBC content without requiring additional assistive technologies.

Techniques

n/a

Tests

Procedure Expected Result Type
Test every foreground and background colour combination against the Snook colour contrast checker Every combination must pass against the WCAG 2.0 AA standard Manual / Tool

Using the standards and guidelines

You can use use and re-use the the BBC Accessibility Standards and Guidelines under an Open Government Licence for Public Sector Information.

Details can be found on the Open Government Licence for Public Sector Information website.

Feedback

We would love to hear your feedback. If you have a question or comment about the standards or guidelines email us at AccessibilityTeam@bbc.co.uk.

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