Vista Access Architects - Blog
Luminance Contrast, where is it required?
Luminance Contrast is the amount of light reflected from one surface as compared to the amount of light reflected from another surface. Australian / New Zealand Standard AS/NZ 1428.4.1-2009 requires Luminance contrast in a range of 30% to 60% based on the type of building elements.
As a bare minimum for compliance with the BCA 2016, the following requirements apply:
- 30% luminance contrast to Signage, Doorways, Stairway Nosing strips, Accessible toilet seats, Lift buttons and integrated TGSIs (Tactile Ground Surface Indicators)
- Additional luminance contrast requirements apply to Discrete and Composite TGSIs. For example, 45% luminance contrast is required to Discrete TGSIs to the background, while 60% luminance contrast is required to Composite TGSIs (2 colours).
Luminance contrast is determined via on-site testing. However where LRV of 2 colours is know by means such as a fan deck, an indicative level of luminance contrast can be determined via our FREE Luminance Contrast Calculator.