Bug 121173 - REGRESSION: Color rendering varies between images and HTML elements
Summary: REGRESSION: Color rendering varies between images and HTML elements
Status: RESOLVED WORKSFORME
Alias: None
Product: WebKit
Classification: Unclassified
Component: New Bugs (show other bugs)
Version: 528+ (Nightly build)
Hardware: Mac All
: P1 Major
Assignee: Tim Horton
URL: http://login.cridb.com/crid/render.html
Keywords:
Depends on:
Blocks:
 
Reported: 2013-09-11 11:31 PDT by Pokey
Modified: 2014-12-01 11:13 PST (History)
4 users (show)

See Also:


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Description Pokey 2013-09-11 11:31:22 PDT
REGRESSION: Colours render differently when the same value is assigned to an image (jpeg,png,gif) and an HTML element (div bgcolor). This makes it difficult to create seamless transitions between images and HTML elements. The visibility of the problem varies depending on the monitor hardware (on a low-end LG monitor the difference screams as opposed to a high-end NEC monitor where the difference is subtle but still visible.)

On the webpage the problem shows on the background of the arrows in between the columns.

DigitalColor Meter shows a difference in the readout: (HTML element) L*a*b* 80.39-2.51-4.52 (GIF image) L*a*b* 79.22-2.51-3.51

This problem does not appear in Chrome, Firefox, or Internet Explorer (all up-to-date versions as of 9/11/2013).
Comment 1 Pokey 2013-09-11 11:35:20 PDT
This bug did not occur in Safari 5.
Comment 2 Alexey Proskuryakov 2013-09-24 09:48:33 PDT
Could you please attach a screenshot with this issue visible?
Comment 3 Pokey 2013-09-24 10:59:23 PDT
I get a 500 error when I try to upload a screenshot.

Here is a test page that shows the problem with a checkerboard pattern: http://login.cridb.com/crid/render.html

The colour difference can be very subtle, but again the use of the DigitalColor Meter will confirm the colour shift.

Thanks for your interest.
Comment 4 Alexey Proskuryakov 2013-09-24 11:11:12 PDT
Thank you, it is certainly easier to see with the checkerboard.

I can reproduce this behavior with Safari 6.0.5 on 10.8.5. I don't have Safari 5 to test with.
Comment 5 Pokey 2013-09-24 11:44:23 PDT
I might add that the colour of the graphic is accurate, it is the colour of the html element that is incorrect.
Comment 6 Pokey 2014-11-28 10:48:48 PST
It has been a while since I checked but this bug appears to be fixed in the latest WebKit build (Version 7.0.5 (9537.77.4, r176554)).
Comment 7 Simon Fraser (smfr) 2014-12-01 11:13:50 PST
Sounds good.