Perennial Green vs Shamrock
Where Perennial Green belongs to Behr's range, Shamrock is a Sherwin-Williams color. These are both greens, so the question isn't which hue to choose — it's where within green to land. Perennial Green (LRV 11) reflects noticeably more light than Shamrock (LRV 6), a difference of 4 points that becomes especially apparent in rooms with limited natural light. Perennial Green runs green while Shamrock is decidedly cool, which means they'll respond very differently to warm vs cool light sources. With a ΔE of 12.4, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Perennial Green vs Shamrock in Real Spaces
2 real rooms side by side. Seeing Perennial Green and Shamrock in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Living Room
In a living room, color works across both daylight and evening light — the same wall can read very differently at noon and at 8pm. The brightness difference is modest but present — Perennial Green gives the walls a little more lift.
Bathroom
Bathrooms are one of the few spaces where you're genuinely enclosed by the paint color, which makes the choice between these two more consequential. Perennial Green reads slightly lighter here — a subtle but real difference in how open the space feels.
Color Details
Perennial Green vs Shamrock Simulated Comparison
5 simulated room previews — drag the slider on each to see Perennial Green on one side and Shamrock 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 Perennial Green comparisons
See how Perennial Green stacks up against other well-photographed colors across different brands and tones.
