change background color in selected rectangle

[oldtimer]

Yes, that was it! I started with tolerance of 6 and gradually increased the value. When I reached 40 the entire rectangle had the color I wanted. At last! Well, thanks to you, I am learning.

[oldtimer]

I was using zero for tolerance value.

[Bhikkhu Pesala]

What did you choose for the Tolerance value? JPG and WebP images will not use the exact same colour values for every pixel in the background. Zoom in close and you can see the individual pixels. Try with different values for the tolerance.

[oldtimer]

OK Thanks. I have downloaded "all" the plugins, which should include any needed to replace background color in selected area. I have chosen the old and new colors from the image itself as instructed. And nevertheless "Apply to image" still does nothing at all.

[IrfanUserGuyxyx]

At the IrfranView website https://www.irfanview.com/ you can download all the plugins. Click Plugins below either the 32 or 64 bit download. Get the "IrfanView All Plugins - 32-bit Windows Installer
". It should install them by running the download.

[oldtimer]

What Plugins do I need for this operation? Could I be missing a necessary plugin? And when I download a plugin, sys asks what program I want to use to open it, and displays a useless meny of programs designed to open some specific other kind of file. I don't know what to say.,

[oldtimer]

I followed exactly the precedure described immediately above by IrfanUserGuyxyx. It did produce one change: the“old color” was restored to the original color, replacing the minimum-saturation version. This makes no difference to me, as neither is what I want. But the desired change, old color to new, still escapes me. I press Apply to Image, and once agein, nothing happens.

[IrfanUserGuyxyx]

I tried "replace color" with a selection. By choosing the source color directly on the image with left-click I was able to do a replacement only inside the selected area by clicking "Apply to current image" or "OK". Try selecting your "Old Color" directly on the image with the mouse left-click. Make sure "Tolerance value" is set >0.

[oldtimer]

I am still unable unable to change the background color of the rectangle in the jpg image. I have the image in Irfanview, free of the “crop” trap it was in several days ago, and have selected the image and made the writing in it legible by minimizing the saturation of the original background color. But the resultant red clashes with the colors of the image. Clicking on “Image”, I find “Replace color” in the dropdown menu. This sounds like just what I want. I have successfully selected the rectangle. I have put the current (low saturation) color in the “Replace source color” window, and color I want, taken from the image itself, in the “with new color” window.
The Old Color is RGB 255, 24, 26, Hex FF181A.
The New Color is RGB 226, 196, 176, Hex E2C4B0.
I click on “Apply to current image”. Nothing happens.
I need it to happen. What am I missing?
?

[IrfanUserGuyxyx]

I mean the IrfanView Paint (Edit/Show paint dialog) or F12. Then you paint the area you want to replace color. If you set the Width very large you can paint the whole image at once. By paint I mean hit left click on area to change. The selection limits the area that can be painted.

[oldtimer]

I continue to make progress but cannot achieve success. Currently I am free of the "crop" prison. I have the image displayed and the rectangle in question selected. I have the "Replace color" option up. In the "Source color" window, the current background color of the rectangle (RBG 255, 24, 26, Hex FF181A) is displayed. In the "New color" the background color I want (RGB 226, 196, 176, Hex E2C4B0) is displayed. This is exactly what I need. I click on "Apply to current image"--and nothing happens. I cannot get it to make the replacement. What am I missing?

[oldtimer]

Obsolete message

[oldtimer]

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[oldtimer]

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[oldtimer]

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