Celtic Forest 3 vs Book Room Green
Where Celtic Forest 3 belongs to Dulux's range, Book Room Green is a Little Greene color. Hue-wise, Celtic Forest 3 belongs to the beige-greige family and Book Room Green to the beige-green family. They have nearly identical light reflectance values (52 vs 50), so they'll read as similarly Medium in most lighting conditions. Celtic Forest 3 runs warm while Book Room Green is decidedly yellow, which means they'll respond very differently to warm vs cool light sources. At ΔE 1.6, 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.
Celtic Forest 3 vs Book Room Green in Real Spaces
1 real room side by side. Celtic Forest 3 and Book Room Green 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.
Bedroom
The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. At this scale the difference is subtle — you'd need them side by side, as shown here, to reliably tell them apart.
Color Details
Celtic Forest 3 vs Book Room Green Simulated Comparison
5 simulated room previews — drag the slider on each to see Celtic Forest 3 on one side and Book Room Green 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 Celtic Forest 3 comparisons
See how Celtic Forest 3 stacks up against other well-photographed colors across different brands and tones.
