<page xmlns="http://projectmallard.org/1.0/"
type="topic" style="question"
id="color-missingvcgt">
<info>
<link type="guide" xref="color#problems"/>
<link type="seealso" xref="color-gettingprofiles"/>
<desc>Whole-screen color correction modifies all the screen colors on all windows.</desc>
<credit type="author">
<name>Richard Hughes</name>
<email>richard@hughsie.com</email>
</credit>
<include href="legal.xml" xmlns="http://www.w3.org/2001/XInclude"/>
</info>
<title>Missing information for whole-screen color correction?</title>
<p>
Unfortunately, many vendor-supplied ICC profiles do not include the
information required for whole-screen color correction.
These profiles can still be useful for applications that can do color
compensation, but you will not see all the colors of your screen change.
</p>
<p>
In order to create a display profile, which includes both calibration and
characterization data, you will need to use a special color measuring
instruments called a colorimeter or a spectrometer.
</p>
</page>