Comparison

Iron Mountain vs Oyster Catch

Benjamin Moore 2134-30 and Vista Paint 0585, ΔE 2.72 apart

Benjamin Moore Iron Mountain 2134-30 on a wall, hex #575553
Iron Mountain Benjamin Moore 2134-30
Vista Paint Oyster Catch 0585 on a wall, hex #54544E
Oyster Catch Vista Paint 0585
Zeytin’s verdict · ΔE 2.72Close cousins. Paint a sample of each before you choose.

Benjamin Moore Iron Mountain (2134-30) and Vista Paint Oyster Catch (0585) measure a delta-E of 2.72 apart. Iron Mountain is 2 LRV points lighter, which is the difference you notice first. Oyster Catch holds more color, chroma 3.7 against 1.5, so it grays out less in dim light. The undertones part company: Iron Mountain reads as a true neutral at hue angle 74.9 degrees, Oyster Catch as a yellow cast at 109.5. Close, but a large sample of each will show the gap, particularly against white trim. If you need the Oyster Catch depth in Benjamin Moore's line, start from its LRV of 9.0 rather than matching by name.

Is Benjamin Moore Iron Mountain the same color as Vista Paint Oyster Catch?

Not quite, but close - Benjamin Moore Iron Mountain and Vista Paint Oyster Catch are delta-E 2.72 apart, close enough that most rooms would not show the difference.

What is the delta-E between Benjamin Moore Iron Mountain and Vista Paint Oyster Catch?

The measured color distance between Benjamin Moore Iron Mountain and Vista Paint Oyster Catch is delta-E 2.72.

Which is lighter, Benjamin Moore Iron Mountain or Vista Paint Oyster Catch?

Benjamin Moore Iron Mountain is lighter than Vista Paint Oyster Catch by 2 points of light reflectance (LRV).

CLOSEST PAIRΔE 2.72 Iron Mountain and Oyster Catch
LIGHTESTIron Mountain LRV 11.0
DARKESTOyster Catch LRV 9.0
SPREAD2LRV points

Side by side

measured values
Iron Mountain Oyster Catch
Brand Benjamin Moore Vista Paint
Code 2134-30 0585
Hex #575553 #54544E
Light reflectance 11.0 9.0
Undertone true neutral yellow cast
Chroma 1.5 3.7
Hue angle 74.9° 109.5°
Color family black black

Each on its own

full detail