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.
Ammonite reflects far more light (LRV 69 vs 52), opening up a space where Celtic Forest 3 encloses it.
At LRV 83 vs 52, White Dove is decisively the brighter choice.
At LRV 52 vs 6, Celtic Forest 3 is decisively the brighter choice.
With LRVs of 52 and 52, the two reflect almost the same amount of light.
Celtic Forest 3 reflects far more light (LRV 52 vs 30), opening up a space where Evergreen Fog encloses it.
Their light reflectance is nearly identical (LRV 52 vs 52), so neither reads brighter in a room.
Agreeable Gray reads slightly lighter (LRV 60 vs 52), a gap that shows most in low-lit rooms.
A 6-point LRV gap (58 vs 52) makes Accessible Beige the marginally brighter of the two.
At LRV 52 vs 27, Celtic Forest 3 is decisively the brighter choice.
Celtic Forest 3 reads slightly lighter (LRV 52 vs 43), a gap that shows most in low-lit rooms.
Celtic Forest 3 reflects far more light (LRV 52 vs 4), opening up a space where Naval encloses it.
A 3-point LRV gap (55 vs 52) makes Tranquil Dawn the marginally brighter of the two.
At LRV 52 vs 13, Celtic Forest 3 is decisively the brighter choice.
A 8-point LRV gap (52 vs 44) makes Celtic Forest 3 the marginally brighter of the two.
Pure White reflects far more light (LRV 84 vs 52), opening up a space where Celtic Forest 3 encloses it.
Celtic Forest 3 reflects far more light (LRV 52 vs 21), opening up a space where Artichoke encloses it.
At LRV 66 vs 52, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 52, Shoji White is decisively the brighter choice.
At LRV 83 vs 52, Snowbound is decisively the brighter choice.
With LRVs of 52 and 51, the two reflect almost the same amount of light.
At LRV 52 vs 12, Celtic Forest 3 is decisively the brighter choice.
At LRV 52 vs 8, Celtic Forest 3 is decisively the brighter choice.
At LRV 68 vs 52, Skimming Stone is decisively the brighter choice.
Celtic Forest 3 reads slightly lighter (LRV 52 vs 41), a gap that shows most in low-lit rooms.
At LRV 52 vs 12, Celtic Forest 3 is decisively the brighter choice.
A 7-point LRV gap (52 vs 45) makes Celtic Forest 3 the marginally brighter of the two.
Celtic Forest 3 reflects far more light (LRV 52 vs 31), opening up a space where Pale Green encloses it.