Cleanroom white vs Cotton White
Where Cleanroom white belongs to RAL Classic's range, Cotton White is a Sherwin-Williams color. These are both beige-whites, so the question isn't which hue to choose — it's where within beige-white to land. They have nearly identical light reflectance values (89 vs 87), so they'll read as similarly Light in most lighting conditions. At ΔE 2.7, these are close — the kind of difference that matters when choosing between them, but doesn't read strongly in a finished room. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Cleanroom white vs Cotton White in Real Spaces
1 real room side by side. Cleanroom white and Cotton White 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.
House
Seen across an entire facade, subtle tonal differences become pronounced. What reads as nearly the same on a chip often reads as clearly different at scale. At this scale the difference is subtle — you'd need them side by side, as shown here, to reliably tell them apart.
Color Details
Cleanroom white vs Cotton White Simulated Comparison
5 simulated room previews — drag the slider on each to see Cleanroom white on one side and Cotton White 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 Cleanroom white comparisons
See how Cleanroom white stacks up against other well-photographed colors across different brands and tones.
