Grape Arbor vs RAL 570-4
Where Grape Arbor belongs to PPG's range, RAL 570-4 is a RAL Effect color. Grape Arbor reads as blue-purple, while RAL 570-4 reads as blue — two distinct hue families, not close cousins. They have nearly identical light reflectance values (36 vs 35), so they'll read as similarly Medium in most lighting conditions. The ΔE 5.1 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
Grape Arbor vs RAL 570-4 Simulated Comparison
5 simulated room previews — drag the slider on each to see Grape Arbor on one side and RAL 570-4 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 Grape Arbor comparisons
See how Grape Arbor stacks up against other well-photographed colors across different brands and tones.
