“It wasn’t until I had my vision tested that I discovered I had a green colour deficiency and so colour overload is a problem, such as occurs in some pie-charts. I tend to use blue as this is usually a safe colour for presentations and when developing web pages if you have a colour deficiency – blue, pale colours.  When items are highlighted, the text goes white on a blue background.

To show you how this looks I have made a PowerPoint presentation about colour deficiencies – it is available for download from Slideshare.”

Jim – Computer Science.