Color changing under graphic inclusion with graphicx

[Paulo Ney de Souza]

On Sat, Jan 9, 2021, 1:27 PM Herbert Voss <Herbert.Voss at fu-berlin.de> wrote:

>
>
> No, it means that _all_ used colors on LaTeX level will be converted into
> the RGB model. By default xcolor uses rgb (0..1).
> This is only a problem when using an image as background. The
> colormodell on LaTeX level must be the same as the color model
> of your image. Otherwise blue (cmyk) is not blue (rgb) ...
>


Well, but in my case the background is in RGB. The images are in RGB, and
color is the same in all 4 of them. Two show the difference against the
background and two do not. What is the difference between the first two
images and the last two images?

>
>
>
>
> no, there are a lot of possible color models and all must be converted
> into one which are valid for the PDF.
>


Isn't PDF the format that allows many color models on the same page?

How would anyone produce a graphics in RGB and another in Lab in the same
page with that restriction?



> >
> > 3- What does the second row of mages have that the first do not???
> >
>
> I do not understand this question. I used only your four images.
>
> Herbert


I attached 4 files and they have the same background color and two of them
show the problem and two not. What is different on the graphics to display
that behaviour?

Paulo Ney
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