Is there any way I can use multiple border colors in one singular gallery? I have a page here, and as you can see, I have 3 separate galleries with separate border colors. Is there any possible way I can make one large gallery and still keep all the different border colors? Thanks.
Unfortunately, I don't think there is a way to do that. Even if you could provide multiple colors as input, you would also need to tell the gallery which colors go with which images. I am almost certain there isn't a way to do that.
Some unsolicited advice
The HTML center tag is deprecated. It is generally suggested that CSS be used to center objects/text. That being said, the image syntax actually provides a way to center the image.
If you follow the first bullet, the br tags after the centered images are also not necessary. Even if you want to keep them, I would suggest using self-closing tags instead of having unmatched opening tags.