2010 ADA Standards for Accessible Design Pocket Guide
703.6 Pictograms.
Pictograms shall comply with 703.6.
703.6.1 Pictogram Field.
Pictograms shall have a field height of 6 inches (150 mm) minimum. Characters and braille shall not be located in the pictogram field.
Figure 703.6.1 Pictogram Field
703.6.2 Finish and Contrast.
Pictograms and their field shall have a non-glare finish. Pictograms shall contrast with their field with either a light pictogram on a dark field or a dark pictogram on a light field.
Advisory 703.6.2 Finish and Contrast. Signs are more legible for persons with low vision when characters contrast as much as possible with their background. Additional factors affecting the ease with which the text can be distinguished from its background include shadows cast by lighting sources, surface glare, and the uniformity of the text and background colors and textures.
703.6.3 Text Descriptors.
Pictograms shall have text descriptors located directly below the pictogram field. Text descriptors shall comply with 703.2, 703.3 and 703.4.
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