Screen Resolution/color difference... or something like that

I didn't do a search because I'm not sure what I'm searching for, but my images on the home computer screens (double screens and where I do my post-processing and editing) look different in lightroom and Corel Paintshop (only for watermarking) but when I upload them to facebook or my website or here, they don't look the same and they don't look the same on my office computer or laptop.
What's going on and how do I fix it?

It is most likely due to colour space issues. Lightroom uses a modified version of the ProPhotoRGB colourspace when displaying preview images. This is fine because Lightroom is a colour managed environment and it honours whatever colourspace is applied to an image.

However, many other applications aren't colour managed and will just ignore any colour space other than sRGB - or rather they will just assume an image is sRGB and try to display it as such. This will result in colours being displayed incorrectly.

So, the solution to your problem is to check what colourspace is being used at each stage. Lightroom and Paintshop should be set to use the same colourspace during editing, so when Lightroom creates a (TIFF?) to pass to Paintshop it is in the same ProPhotoRGB colourspace. Then, when you want to create a JPEG to post to the web etc you need to export it as sRGB. This means you need to make sure that both LR and Paintshop are set to export JPEGs in the same colourspace (sRGB). Better yet get into the habit (if you aren't already) or finishing Paintshop edits by passing the image back to LR and using that to export the final JPEG.

Here is an article on LR and colouspaces http://digital-photography-school.com …w-lightroom-colour-space/

Note: there are times when you might need to use a different colourspace but these are likely to be few and far between. Unless someone specifically requests a different colourspace it is best to stick with sRGB for posting online are sharing via email.

This might help: Trouble switching from CRT monitor to a Laptop LCD screen.

Dan Marchant wrote in post #18160752
It is most likely due to colour space issues. Lightroom uses a modified version of the ProPhotoRGB colourspace when displaying preview images.

Actually that only applies in the Develop module. LR uses AdobeRGB for display pretty much everywhere else, see this link for the LR help file. This I think is the most important thing to know:

Lightroom uses Adobe RGB:

for previews in the Library, Map, Book, Slideshow, Print, and Web modules
when printing in Draft mode
in exported PDF slideshows and uploaded web galleries
when you send a book to Blurb.com (If you export books as PDF or JPEG from the Book module, however, you can choose sRGB or a different color profile.)
for photos uploaded to Facebook and other photo-sharing sites using the Publish Services panel

Of course this won't really make any difference to the way that you see the images in the program, or between the Develop module and most other parts of the program, since LR is colour managed, and so the images will always be converted to the monitors colour space for display. What is probably more important is knowing which other programs on the computer are colour managed, and which aren't. I have checked with Win 10 and it seems that, Windows Explorer, or rather File Explorer as it is now called IS colour managed, for JPEG files at least, when using thumbnails for icons the thumbnails are displayed with the correct colour on my calibrated system. Photos, the new image display program that is bundled with W10 is most definitely NOT colour managed. It seems to pass the numbers straight through. When using the test targets from here with my Dell UP2725K monitor, which has built in profiles for 100% sRGB and 98% aRGB the files with the approprite profiles display correctly, while the test "Whacked" profile never displays correctly. Paint is also not colour managed. I couldn't quickly figure out how to open the file in Edge, but it seems for correctly tagged files IE11 and Chrome are colour managed. Oh and I have Office 2007, and the Office image viewer for that is also colour managed.

Alan