Microsoft Excel 2016 Basic Authoring and Testing Guide

Unacceptable contrast (Foreground=#AAAAAA, Background=white, Ratio=2.32:1) Also, always use a single solid color for a text background rather than a pattern. In order to determine whether the colors in your document have sufficient contrast, you can consult an online contrast checker, such as: Juicy Studio: Luminosity Color Contrast Ratio Analyzer ................
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