White aluminium vs Castlegate
Where White aluminium belongs to RAL Classic's range, Castlegate is a Sherwin-Williams color. White aluminium reads as grey-white, while Castlegate reads as grey — two distinct hue families, not close cousins. White aluminium (LRV 46) reflects noticeably more light than Castlegate (LRV 37), a difference of 9 points that becomes especially apparent in rooms with limited natural light. At ΔE 2.3, these are close — the kind of difference that matters when choosing between them, but doesn't read strongly in a finished room. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
White aluminium vs Castlegate Simulated Comparison
5 simulated room previews — drag the slider on each to see White aluminium on one side and Castlegate 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 White aluminium comparisons
See how White aluminium stacks up against other well-photographed colors across different brands and tones.
