https://bugs.kde.org/show_bug.cgi?id=511047
Bug ID: 511047
Summary: The " background contrast" layer in the blur effect
does not, in fact, help with contrast
Classification: Plasma
Product: kwin
Version First 6.5.0
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: effects-various
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
It may even give negative results, specifically in dark mode.
"background contrast" was previously a separate toggleable effect but now it's
been merged into the blur effect.
As far as I can tell it mainly just lightens the background behind blurred
windows, as to make the assumingly darker text contrast more. This however does
the complete opposite when the text is light.
I suggest to make it toggleable once more. Or, even better, deprecate it
completely, as in my opinion, I think it is already up the application to
decide how contrasting it wants its background to be, given that it controls
the opacity of the background color, which should already provide enough
contrast to the content.
For example an app can have a dark translucent background with light text (E.g.
terminal apps), this can be and often is in disregard to the global color
theme. If the application is configured to add blur to the background, no
additional tinting is required as the translucent background is added to the
blur behind darkens it. While the background contrast filter would attempt to
lighten it.
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