I tried using the Advanced Photo renderer with different wall colors: 2 are beige and one is blue. As you can see, the colors are very soft, you can hardly tell that the 2 beige walls have color.
My settings:
North is at 60, the time is about 1:20pm, Silk walls, ceiling, and floors is set to "off" but I did use the Silk rendering setting with ceiling, lamp, and sun checked off (meaning the box is checked). The power for the wall lights is set to 40%
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Sweethome3dLvgRm.png
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(Living Room rendered from the Advanced Photo Renderer)