The Access Central Luminance Contrast Assessment Tool (LCAT) is simple and free to use.
The Luminance Contrast Assessment Tool (LCAT) allows the user to enter in the LRVs, or Luminance Reflective Values, of two or more products or paint colours and instantly see if the results comply.
If the results don’t comply, then an alternate product or paint can be specified.
You can use the Tool to compare two products/paint colours in the ‘Single Comparison‘ sheet, or ‘Multiple Comparison‘, where you can compare up to 8 different combinations side by side.
You can get a copy of the LCAT here