What if you build several other variants:
-background absolute black (0,0,0)
-background dark blue (34,34,102)
-black font copyright message (0,0,0) and white background (255,255,255)
-black font copyright message (0,0,0) and light grey background (221,221,221)
-font copyright message golden (153,153,0)
Note: BTW, I am using your exact same palette in this propositions
