The feather was blue in the first place but the background didn't suit the image. I added a hue/saturation layer in photoshop (set to colourize) then added a colour balance layer on top. Finally i just tweaked the levels to increase the overall contrast.
pictures like this are very common on this site, but this one kinda stands out, i think. i really like how the background looks, all blurry and stuff and it's a nice blue tone
and it's a nice blue tone