Do you have any tips on how to easily test your design, colour and contrast, on your computer? Sometimes you only need a small tweak on that greyish color to make it more accessible for people with poor contrast displays or visually impaired. And this I would like to test in a easy way.
I've heard someone talking about switching to "Invert colours" and "Use greyscale" under "Accessibility" (I'm using OSX).
I've also used this tool before: http://snook.ca/technical/colour_contrast/colour.html
But are there any other useful hints that you use?