code: func (h *JHD1313M1Driver) SetRGB(r, g, b int) error {
  	if err := h.setReg(REG_RED, r); err != nil {
  		return err
  	}
  	if err := h.setReg(REG_GREEN, g); err != nil {
  		return err
  	}
  	return h.setReg(REG_BLUE, b)
  }
docs: // SetRGB sets the Red Green Blue value of backlit.