I have very little experience with image manipulation. This is probably a very simple procedure, but I have no idea how to do it.
I have an image that I want to use, and it’s perfect for my intentions except for the color. How do I change the color (hue) of this image without touching anything else like the size or transparent background?
Use an image editor, such as GIMP or Photoshop.
In GIMP click File > Open, open the PNG image. Click Colours > Hue-Saturation. Adjust the hue slider. Then File > Export As, give your file a new name and end with the file extension .png – then hit Export.
In Photoshop click File > Open, open the PNG image. Click Image > Adjustments > Hue/Saturation. Adjust the hue slider. Then File > Save As, give your file a new name, then hit Save.