Hi there.
Sorry about the late reply. I have been busy with a lot of things.
I read your comic, and the only thing I suggest is de-saturating the color. This will help with the mood of your story. The more vibrant a color is, the brighter the mood. By de-saturating the color, you can create a more somber mood (and also help our eyes). I'm not saying do gray scale, or get rid of color entirely, I'm saying to experiment with shadows and tints. For example, the red for the blood can be darker (because when blood is exposed to air, it oxidizes). Again, color is all up to you. I hope this helps a little.