River Valley vs Window grey
Where River Valley belongs to Dulux's range, Window grey is a RAL Classic color. Hue-wise, River Valley belongs to the blue family and Window grey to the blue-grey family. River Valley (LRV 44) reflects noticeably more light than Window grey (LRV 36), a difference of 8 points that becomes especially apparent in rooms with limited natural light. The ΔE 9.9 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
River Valley vs Window grey Simulated Comparison
5 simulated room previews — drag the slider on each to see River Valley on one side and Window grey on the other.
Digital color is approximate. These simulations are generated from the manufacturer's hex values and overlaid on grayscale room photos — your screen's calibration, brightness, and viewing angle all affect how they render. Before committing to either color, test physical samples in your own space under the light you actually live with.
More River Valley comparisons
See how River Valley stacks up against other well-photographed colors across different brands and tones.
