Gray Value Issues in Presentation and Screen Design

Have you ever looked at a presentation or computer screen where one of the design elements or print seemed to recede into the background? Maybe, you just noticed that the contrast between the print and the background is low and makes the print hard to read? These effects are caused by errors in gray value design. What is gray value? by David Orr, Continued.... http://www.orrnet.biz/Blogs/gray_value_issues_in_presentatio.htm