I work for Retro Army making Super Trench Attack! I worked previously in the industry for 14 years, for various companies. I also made Last of the patriots (free game) and The Old Man Game. I mainly dabble in Art/code/and design, but I'm trying to move into the business side of things now, must be showing my age. I also try to help younger developers get a start in the industry when and where possible.
Here I was trying to sort out what the background should look like. The colours need to complement the character and the HUD, but the main characters need to stand out, I ended up making the backgrounds lower contrast which solved the problem for me.