Button appears hazy or grayed out

I have a red “read more” button in my slider that looks lovely if I right click on it and say “view in new tab.” However, on my site it looks faded, like there is some film over it. I’ve searched the forums, and tried all the solutions suggested. It’s saved in sRGB, it is cropped to the right size outside of WP, and there is no opacity on the button.

I’ve never encountered this problem before. Please help!

https://174.120.83.6/~federfir/