Undine vs RAL 730-4
Where Undine belongs to Behr's range, RAL 730-4 is a RAL Effect color. Both sit in the blue family, which is useful context if you're narrowing within a single hue direction. Undine (LRV 43) reflects noticeably more light than RAL 730-4 (LRV 38), a difference of 5 points that becomes especially apparent in rooms with limited natural light. The ΔE 3.8 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Undine vs RAL 730-4 in Real Spaces
1 real room side by side. Undine and RAL 730-4 are close enough that the difference can be hard to judge from a chip alone — these photos show how each reads at scale, across different spaces and lighting conditions.
Color Details
Undine vs RAL 730-4 Simulated Comparison
5 simulated room previews — drag the slider on each to see Undine on one side and RAL 730-4 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 Undine comparisons
See how Undine stacks up against other well-photographed colors across different brands and tones.
