code: func (c RGBA) Add(d RGBA) RGBA {
  	return RGBA{
  		R: c.R + d.R,
  		G: c.G + d.G,
  		B: c.B + d.B,
  		A: c.A + d.A,
  	}
  }
docs: // Add adds color d to color c component-wise and returns the result (the components are not
  // clamped).