Will furniture colors look the same in real life as in the preview?
Closer than a product photo, but not identical. The most useful thing a room visualization does for color is adapt the furniture's tones to match the lighting in your room photo rather than presenting the studio-lit version you see on a product listing. That single adjustment makes the preview significantly more useful for judging color fit.
The adaptation follows your room's actual light. A warm-lit room will make the furniture appear warmer in the preview. A cool, north-facing room will shift the color slightly cooler. These are exactly the same shifts the piece would undergo when it arrived in your home, so the preview gives you a realistic read on how the color will settle into your specific light environment.
Two variables remain outside the preview's control. Your screen's color calibration affects how you perceive the result, and very subtle color distinctions between two similar shades can be hard to resolve in any digital format. For straightforward decisions such as whether a warm tan sofa will work with your existing warm wood tones, the preview is more than enough. For close-call color matching, a physical swatch is still the most reliable final check.
The practical approach is to use the preview to rule out obvious mismatches and narrow the field, then order a swatch for the finalists. Try it free on your own photo.