Two of the Same Texture, one appears darker...

I have created two textures, the PNGs are both the exact same colour and both were imported with the default settings. However, when being added to my a HUD through widget, one of them appears darker than the other. Can anyone help?
buttons

Double click on the texture and see if the texture is set to sRGB. Alternatively, see if the same applies if you create a .png image from scratch.

I recently print-screened an image directly from my phone, pasted it into Photoshop, did some changes, exported it; when I then checked it in Unreal Engine it wasn’t looking correct. I went back into Photoshop, but this time rasterized the image before exporting and it solved the issue.