The eleven screens in this review vary to some degree in their latent color biases. Some are close to neutral while others tend to skew toward a cooler picture, producing crisper "whiter" whites. However, the color temperature and direction of the ambient light tends to have more of an effect on the ultimate result than any particular screen's bias. North-facing windows will introduce more blue ambient light than will incandescent lamps. The interior color of walls, carpets, furniture can also bias the color of the ambient light. So no matter what the inherent color bias of the screen itself may be, if one wants as close to neutral color balance in the image as possible, the environmental factors would need to be calibrated out on the projector by a professional installer (assuming the environmental factors are constant).
At the end of the day, none of these eleven screens are so biased that one would choose one over another based on color bias instead of the more consequential performance variables of contrast, black levels, viewing angles and visible/texture artifacts. On each of these performance factors ALR screens differ substantially. Since color attributes in any given installation can be largely corrected with projector calibration, the latent color bias of any particular screen is the least important factor to consider in selecting an ALR screen.