https://bugs.documentfoundation.org/show_bug.cgi?id=172711
Bug ID: 172711
Summary: PNG images change colour when exported to PDF on
macOS, while equivalent SVG images do not
Product: LibreOffice
Version: 26.2.2.2 release
Hardware: Other
OS: macOS (All)
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: Writer
Assignee: [email protected]
Reporter: [email protected]
Description:
I am using LO to create a PDF that is to be printed using KDP (Kindle Direct
Print). The document includes graphics with a specific colour that are also
used for a front cover created using a professional graphics package. The LO
content uses a PNG for the graphics, derived from the same EPS file as is used
for the front cover.
However, the colours are different within the KDP environment.
Steps to Reproduce:
1. Create a coloured square in Inkscape.
2. Save it as a plain SVG.
3. Export the same artwork as a png.
4. Create a new Writer document.
5. Insert both images.
6. Verify that they have identical colours in LibreOffice.
7. Export the document using File → Export as PDF.
8. Open the PDF in Preview - the colours are now different.
The attached LO document includes the images I used. I used the "Digital Colour
Meter" app to measure the colours as shown on the screen.
Actual Results:
Within LO, both images have the same colour (#820b27).
Within the exported PDF, the SVG's colour is #820c27, whilst the PNG's is
#8f00274.
The colour of the SVG is virtually the same in the pdf as in the LO document,
but that is not the case for the PNG.
Expected Results:
The colours should be the same.
Reproducible: Always
User Profile Reset: Yes
Additional Info:
I tried adding/removing colour profiles from the PNG, but that made no
difference to the colours in the export.
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