Converting Adobe RGB to sRGB in Lightroom And Photoshop: SRGB and Adobe RGB include an equal amount of colors, but the range of sRGB is narrower. Adobe RGB is said to have a 35% wider gamut of color than sRGB. If you work mostly in web form but think that in the future you may need the wider color range that Adobe RGB can provide, then save your files in the Adobe RGB color space.
Whether you use Photoshop or Lightroom, it’s very simple to convert your color space. Just note that you can convert Adobe RGB to sRGB successfully, but not vice versa.
In Lightroom, go to > Preferences. Choose the > External Editing tab at the top of the menu. Click on the dropdown menu beside >Color Space and choose >AdobeRGB (1998).

You can also choose to save your image in the desired color space upon export in Lightroom, as in the image below. Go to >File Space and choose >sRGB or >Adobe RGB from the dropdown menu.

In Photoshop go to > Edit. Choose >Convert to Profile. Under >Profile choose >sRGB from the dropdown menu

Which is Better sRGB or ProPhoto RGB?
ProPhoto RGB is a color space that is also suitable for printing and has a wide color gamut. If your images will appear only on the web or social media, then sRGB is the better choice.
What Color Space is Best for Printing?
SRGB is used for screens. If you want to print your work, you’ll need to save your files as sRGB or CMYK. Your printer will advise you on the preferred color space format for your files.