Blue Harmony vs Old Silk
Blue Harmony is a Jotun color while Old Silk comes from PPG. These are both blue-greys, so the question isn't which hue to choose — it's where within blue-grey to land. With LRVs of 17 and 17, they'll behave almost identically in terms of how much light they reflect back into a room. With a ΔE of 2.5, the difference is subtle — you'd need them side by side to reliably tell them apart. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Blue Harmony vs Old Silk in Real Spaces
2 real rooms side by side. Blue Harmony and Old Silk 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.
Living Room
Living rooms test a color across a full range of conditions — morning sun, afternoon shade, and evening lamp light all shift how both of these read. In photos like these you're seeing the difference at its most direct. In a finished room, the distinction is there but not dramatic.
Bedroom
Bedroom walls are often seen under warm artificial light, a context that shifts both colors from how they look on a chip. The two are close enough that the choice comes down to finer qualities — undertone, texture, what the color sits next to.
Color Details
Blue Harmony vs Old Silk Simulated Comparison
5 simulated room previews — drag the slider on each to see Blue Harmony on one side and Old Silk 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 Blue Harmony comparisons
See how Blue Harmony stacks up against other well-photographed colors across different brands and tones.
At LRV 69 vs 17, Ammonite is decisively the brighter choice.
White Dove reflects far more light (LRV 83 vs 17), opening up a space where Blue Harmony encloses it.
Blue Harmony reads slightly lighter (LRV 17 vs 6), a gap that shows most in low-lit rooms.
At LRV 52 vs 17, Purbeck Stone is decisively the brighter choice.
At LRV 30 vs 17, Evergreen Fog is decisively the brighter choice.
Mizzle reflects far more light (LRV 52 vs 17), opening up a space where Blue Harmony encloses it.
At LRV 60 vs 17, Agreeable Gray is decisively the brighter choice.
Accessible Beige reflects far more light (LRV 58 vs 17), opening up a space where Blue Harmony encloses it.
Denim Drift reads slightly lighter (LRV 27 vs 17), a gap that shows most in low-lit rooms.
At LRV 43 vs 17, French Gray is decisively the brighter choice.
At LRV 17 vs 4, Blue Harmony is decisively the brighter choice.
Tranquil Dawn reflects far more light (LRV 55 vs 17), opening up a space where Blue Harmony encloses it.
Blue Harmony reads slightly lighter (LRV 17 vs 13), a gap that shows most in low-lit rooms.
Hardwick White reflects far more light (LRV 44 vs 17), opening up a space where Blue Harmony encloses it.
At LRV 84 vs 17, Pure White is decisively the brighter choice.
A 5-point LRV gap (21 vs 17) makes Artichoke the marginally brighter of the two.
Balboa Mist reflects far more light (LRV 66 vs 17), opening up a space where Blue Harmony encloses it.
Shoji White reflects far more light (LRV 74 vs 17), opening up a space where Blue Harmony encloses it.
Snowbound reflects far more light (LRV 83 vs 17), opening up a space where Blue Harmony encloses it.
At LRV 51 vs 17, Pigeon is decisively the brighter choice.
Blue Harmony reads slightly lighter (LRV 17 vs 12), a gap that shows most in low-lit rooms.
Blue Harmony reads slightly lighter (LRV 17 vs 8), a gap that shows most in low-lit rooms.
Skimming Stone reflects far more light (LRV 68 vs 17), opening up a space where Blue Harmony encloses it.
At LRV 41 vs 17, Dix Blue is decisively the brighter choice.
Blue Harmony reads slightly lighter (LRV 17 vs 12), a gap that shows most in low-lit rooms.
Saybrook Sage reflects far more light (LRV 45 vs 17), opening up a space where Blue Harmony encloses it.
At LRV 31 vs 17, Pale Green is decisively the brighter choice.