It appears you have mixed lighting conditions (daylight coming in from the left, falling off to more ambient room light to the right — the color balance shifts from right to left.) Limiting to one light source will help.Thank you Patrick and Wayne. I appreciate both of your comments, as they mean a lot to me.
I am a little troubled that the tans and ochres (background colors) are reading gray. I know my photography skills are pretty bad, but my monitor is calibrated, and the colors are close-ish on my computer screen. So, I wonder what I can do to remedy this.