[Webkit-unassigned] [Bug 115510] New: Disabled textarea with transparent background-color does not render certain grey tones (foreground color) correctly
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Thu May 2 03:37:51 PDT 2013
https://bugs.webkit.org/show_bug.cgi?id=115510
Summary: Disabled textarea with transparent background-color
does not render certain grey tones (foreground color)
correctly
Product: WebKit
Version: 528+ (Nightly build)
Platform: Macintosh
OS/Version: Mac OS X 10.8
Status: UNCONFIRMED
Severity: Normal
Priority: P2
Component: CSS
AssignedTo: webkit-unassigned at lists.webkit.org
ReportedBy: jens.nehlmeier at carecloud.de
Created an attachment (id=200306)
--> (https://bugs.webkit.org/attachment.cgi?id=200306&action=review)
Textarea with wrong rendered foreground color
The summary pretty much speaks for itself.
If you do not specify a foreground color for disabled textareas, Webkit will lighten up the current foreground color to visualize the disabled status.
Adding "background-color:transparent" to such a disabled textarea alters the behavior for certain grey tones. For example "color: #55555;" works as expected but "color: #A0A0A0" results in nearly white text to be rendered instead of a light grey tone.
So with "background-color:transparent" WebKit does some wrong color calculations during rendering.
I have attached a demo that illustrates the problem. It contains a set of 4 textareas with different foreground colors. This set is repeated 4 times (enabled/disabled with and without background-color:transparent) and in the last set the last two textareas behave wrong (color is too bright).
Discovered using Safari on Mac OS 10.7 & 10.8, as well as Webkit Nightly for Mac.
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