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A PDF file is organized using ASCII characters, except for certain elements that may have binary content. The file starts with a header containing a magic number (as a readable string) and the version of the format, for example %PDF-1.7. The format is a subset of a COS ("Carousel" Object Structure) format. [23]
Light qualitative color scheme provides a set of nine colors that work for color-blind users and with black text labels (among other palettes). There are some tools for simulating color-blind vision: Toptal ColorFilter (webpage analysis) and Coblis Color-blindness Simulator (local file analysis).
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PDF/UA (PDF/Universal Accessibility), [1] formally ISO 14289, is an International Organization for Standardization (ISO) standard for accessible PDF technology. A technical specification intended for developers implementing PDF writing and processing software, PDF/UA provides definitive terms and requirements for accessibility in PDF documents and applications. [2]
For formatting guidance see the Wikipedia:Article titles § Article title format section, noting the following: Capitalize the initial letter (except in rare cases, such as eBay ), but otherwise follow sentence case [ e ] ( Funding of UNESCO projects ), not title case ( Funding of UNESCO Projects ), except where title case would be used in ...
An issue with color selection is that the colors with the greatest contrast to the red–green color blind tend to be colors of confusion to the blue–yellow color blind and vice versa. In 2018, UX designer Allie Ofisher published 3 color palettes with 6 colors each, distinguishable for all variants of color blindness.
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A color-blind society, in sociology, is one in which racial classification does not affect a person's socially created opportunities. A racially color blind society is or would be free from differential legal or social treatment based on race or color. A color-blind society would have race-neutral governmental policies and would reject all ...