Universal design: Selecting appropriate colour contrasts for signage

Colour contrast refers to the visual difference between the text or symbol colour and the background colour on a sign, making it easier to read.

Appropriate colour contrast ensures that signage is legible for everyone, including those with visual impairments, elderly individuals, and people viewing signs under various lighting conditions. This promotes inclusivity and accessibility.

Universal Design typically recommends a contrast ratio of at least 4.5:1 for text and background colours. Larger text sizes may allow for a lower contrast ratio of 3:1.

There are online colour contrast checkers and tools available that allow you to input the foreground and background colours to determine the contrast ratio. You can also consult with a Universal Design expert.

You can refer to the Building and Construction Authority (BCA) guidelines on accessibility, as well as consult with interior design professionals experienced in Universal Design principles.