Autonomous vs Fortitude
Autonomous and Fortitude come from the same Sherwin-Williams collection. These are both greys, so the question isn't which hue to choose — it's where within grey to land. Their light reflectance values are nearly the same — 57 vs 56 — so neither will read significantly brighter or darker than the other. Both share a neutral character, which means they'll respond to light and surrounding materials in similar ways. A ΔE of 1.4 puts them in subtle territory — distinguishable in direct comparison, less so from across a room. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Autonomous vs Fortitude in Real Spaces
1 real room side by side. Autonomous and Fortitude 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
Bedrooms are typically lit with warmer, lower light than the rest of the house — a condition that flatters warm tones and deepens cool ones. In photos like these you're seeing the difference at its most direct. In a finished room, the distinction is there but not dramatic.
Color Details
Autonomous vs Fortitude Simulated Comparison
5 simulated room previews — drag the slider on each to see Autonomous on one side and Fortitude 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 Autonomous comparisons
See how Autonomous stacks up against other well-photographed colors across different brands and tones.
At LRV 83 vs 57, White Dove is decisively the brighter choice.
Ammonite reflects far more light (LRV 69 vs 57), opening up a space where Autonomous encloses it.
At LRV 57 vs 6, Autonomous is decisively the brighter choice.
Autonomous reads slightly lighter (LRV 57 vs 52), a gap that shows most in low-lit rooms.
Autonomous reflects far more light (LRV 57 vs 30), opening up a space where Evergreen Fog encloses it.
A 5-point LRV gap (57 vs 52) makes Autonomous the marginally brighter of the two.
Agreeable Gray reads slightly lighter (LRV 60 vs 57), a gap that shows most in low-lit rooms.
Their light reflectance is nearly identical (LRV 58 vs 57), so neither reads brighter in a room.
At LRV 57 vs 27, Autonomous is decisively the brighter choice.
Autonomous reflects far more light (LRV 57 vs 43), opening up a space where French Gray encloses it.
Autonomous reflects far more light (LRV 57 vs 4), opening up a space where Naval encloses it.
Their light reflectance is nearly identical (LRV 57 vs 55), so neither reads brighter in a room.
At LRV 57 vs 13, Autonomous is decisively the brighter choice.
At LRV 57 vs 44, Autonomous is decisively the brighter choice.
Pure White reflects far more light (LRV 84 vs 57), opening up a space where Autonomous encloses it.
Autonomous reflects far more light (LRV 57 vs 21), opening up a space where Artichoke encloses it.
A 9-point LRV gap (66 vs 57) makes Balboa Mist the marginally brighter of the two.
At LRV 74 vs 57, Shoji White is decisively the brighter choice.
At LRV 83 vs 57, Snowbound is decisively the brighter choice.
At LRV 57 vs 12, Autonomous is decisively the brighter choice.
A 11-point LRV gap (68 vs 57) makes Skimming Stone the marginally brighter of the two.
Autonomous reflects far more light (LRV 57 vs 41), opening up a space where Dix Blue encloses it.
Calamine reads slightly lighter (LRV 68 vs 57), a gap that shows most in low-lit rooms.
Autonomous reflects far more light (LRV 57 vs 25), opening up a space where Treron encloses it.
At LRV 57 vs 12, Autonomous is decisively the brighter choice.
A 11-point LRV gap (57 vs 45) makes Autonomous the marginally brighter of the two.
Autonomous reflects far more light (LRV 57 vs 31), opening up a space where Pale Green encloses it.
Autonomous reflects far more light (LRV 57 vs 7), opening up a space where Pine Needle encloses it.
Autonomous reflects far more light (LRV 57 vs 24), opening up a space where Cement grey encloses it.
With LRVs of 57 and 57, the two reflect almost the same amount of light.