docs: Document rule.color.merge

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Tomas Babej 2015-09-02 07:20:24 +02:00 committed by Paul Beckingham
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By default, colors produced by rules blend. This has the advantage of
conveying additional information, by producing combinations that are not used
by any particular rule directly.
However, color blending can produce highlighting combinations which are not
desired. In such cases, use the following option to disable this behaviour:
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.B rule.color.merge=yes
Can be "yes" or "no". When "no", disables merging of colors produced by
different color rules. Use if your color scheme produces unpleasing
foreground and background combinations.
See the task-color(5) man pages for color details.
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