Cosmic Blue vs Idyllic Isle
Where Cosmic Blue belongs to Behr's range, Idyllic Isle is a PPG color. These are both blues, so the question isn't which hue to choose — it's where within blue to land. Idyllic Isle (LRV 55) reflects noticeably more light than Cosmic Blue (LRV 47), a difference of 8 points that becomes especially apparent in rooms with limited natural light. At ΔE 2.2, 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
Cosmic Blue vs Idyllic Isle Simulated Comparison
5 simulated room previews — drag the slider on each to see Cosmic Blue on one side and Idyllic Isle 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 Cosmic Blue comparisons
See how Cosmic Blue stacks up against other well-photographed colors across different brands and tones.
