The following applies to luminance contrast for braille and tactile signs:
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The background, negative space, fill of a sign or border with a minimum width of 5 mm must have a luminance
contrast with the surface on which it is mounted of not less than 30%.
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Tactile characters, icons and symbols must have a minimum luminance contrast of 30% to the surface on which
the characters are mounted.
-
Luminance contrasts must be met under the lighting conditions in which the sign is to be located.
