Rockified

Just found it, it's cyanotype. Thank you so much for the suggestion though!

I used to have an adjustment plugin that basically changes an image's entire color into a blue hue, I would commonly use it to recolor black text and images into blue, then adjust its color using Hue / Saturation. I've lost the plugin's name along with my old laptop and I'm wondering if anyone is familiar with its name. Think of it as the Sepia effect but blue. Hope my explanation made sense. Thanks!