https://bugs.documentfoundation.org/show_bug.cgi?id=163807
Bug ID: 163807
Summary: Automatic color of labels must ensure reasonable
contrast in area of placement
Product: LibreOffice
Version: 7.4.0.3 release
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: Chart
Assignee: [email protected]
Reporter: [email protected]
Created attachment 197483
--> https://bugs.documentfoundation.org/attachment.cgi?id=197483&action=edit
Spreadsheet with a pie chart in a variety of slice colors
If we take a chart with areas in different colors, and add data labels, they
will typically be located on the colored areas of the chart (e.g. slices of a
pie); and - their color will be black. Technically, the color is "automatic",
but effectively, it's always (?) black.
As an example:
1. Open the attached document
2. Double-click the pie chart to enter it
3. On the menu, choose Insert > Data Labels...
4. Toggle "Value as Number"
Expected results:
Labels are set so as to be visible with reasonable contrast in all pie slices
(e.g. using different colors, or some auto-enabled effect such as a
different-color vignette, or shadow, or glow, or outline).
Actual results:
Labels are all set in black color, for both light and very-dark backgrounds.
This is true specifically for the black-colored pie slice, where the label is
completely invisible.
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