:root {
  --mg-grade: -20deg;
}

                                                                                                 
                                                                                                 
                                                                                                
                                                                                                 
                       
div.mg-frameio-aurora,
canvas#skyAurora,
video.ds2-film,
div.bg-mountain,
div.bg-mountain-tint,
div.bg-gradient,
canvas.geo-cv {
  filter: hue-rotate(var(--mg-grade));
}