Do not use color coding alone. Use additional cues such as textual annotations or underlines. Alternatively, use patterns in addition to colors to indicate different types of information in charts and graphs.

Do not use hard-coded colors. Hard-coded colors can become unreadable when using a high-contrast theme, as in a table, chart, or graph.

Do not use hard-to-read color combinations, such as red and green or light green and white. People who have some types of color blindness may have difficulty seeing the differences between the colors.

Do not use art that has screens or tints applied. Do not use text on a screened background, which is difficult to see and for a machine to scan. For the same reason, do not use shaded backgrounds and watermarks or other images behind text.

Do not print text outside a rectangular grid. People who have low vision may have difficulty seeing text outside an established grid. Try to keep text in a uniform space for both visibility and ease of scanning.