Slider Images Black & White When Using After Compression

I ran compression on some images I had in a slider and afterwards, they show all black and white on the site in the slider, even if I try to recreate the slider. I uncompressed the images right away and they show colored in the media library but it won't show colored anymore in the slider. It's very odd but happened after saying to compress these images. I have tried to recreate the slider but the images are black and white no matter where I use them.