HP42 reinforced nailing zone, Sweet Spot nailing area. ASTM D7158 Class H.
Hail / impact
Class 3
UL 2218 Impact-Resistance Test rating. Class 4 is the highest grade; some Florida insurers offer a small discount on hail-rated roofs.
Fire rating
Class A
ASTM E108 / UL 790
Weight per square
250 lbs
Standard architectural asphalt
Algae resistance
Scotchgard Protector
Lifetime-year algae warranty
Manufacturer
Atlas
Atlanta, GA · made in the USA
What you're looking at.
The granule tones the blend is built from, how the colour is classified, and how it behaves on a roof.
Granule 01Base tone#9A9B97
Granule 02Lighter granule#A8A9A5
Granule 03Deeper granule#888985
Hex
#9A9B97
Family
Gray
Undertone
Cool blue
Best in
Daylight
How it shifts
OYSTER SHELL is the kind of gray you choose when you want the roof to recede and the rest of the house to lead. Not quite black, not quite slate. It is a confident, anchored color that absorbs the eye instead of bouncing it. On a south-facing Florida elevation it reads cool and slightly blue. On a north-facing roof in shade it pulls toward true black.
The profile
Up close you can pick out three or four granule shades layered into the surface. From the street they collapse into one mid-dark gray, but the layering is why a quality asphalt roof catches light the way single-color metal never quite does.
Where it belongs
Pairs cleanly with white, cream, navy, sage, and warm terra-cotta sidings. Almost any house color works underneath it.
Pinnacle Pristine OYSTER SHELL, shown two ways: photographs from manufacturers and Florida roofers, and renders that keep the roof color from an install photo and restyle the facade around it. Every image below says which it is.
Manufacturer install
AI-rendered example (street view)
AI-rendered example (dusk view)
AI-rendered example (morning view)
AI-rendered example (street view)
AI-rendered example (dusk view)
AI-rendered example (morning view)
OYSTER SHELL pairs well with.
We do not yet have full-render combination pages for this color family.
Materials-per-square pulled from retailer scrape (Lowe's/Home Depot Florida zips).
Per square (materials)
$123–$141
Home Depot / Lowe's retail snapshot, three bundles per square.
Typical 30-square home
$3,690–$4,230
Materials only. Underlayment, starter strip, and ridge cap not included.
Installed in Florida
$11k–$18k
Full re-roof including tear-off, decking inspection, install, and disposal. Range varies by pitch, square count, and accessibility.
Stop guessing. See OYSTER SHELL on your roof.
Upload a phone photo of your house and watch our AI swap your existing roof for Atlas Pinnacle Pristine OYSTER SHELL in about four seconds. Save the render, share with your contractor, change your mind ten times. Free.
About OYSTER SHELL.
Questions homeowners ask before they commit. Answered without sales spin.
A confident, slightly cool dark gray. It reads close to black in shade and as a clean slate in direct sunlight. The granule blend has a faint cool undertone that keeps it from looking flat. On a Florida elevation with strong overhead light, expect the surface to brighten visibly compared to a cloudy day.
Minimally. Atlas's ceramic granule coating is engineered to hold color for 25 plus years in Florida UV. Expect a barely-visible shift toward a slightly warmer tone over the first 5 years, then stability. The full warranty covers premature fading. Source: Atlas product warranty card and NRCA Asphalt Shingle Manual.
In direct overhead sun it brightens to a clear charcoal with visible dimensional shadow lines. On cloudy days it reads almost black and recedes visually, which flatters most siding colors underneath. At sunset the granule blend shows its warmth.
Slightly, compared to a white or light-gray roof. In Florida, a mid-dark roof adds approximately 5 to 10 degrees Fahrenheit to attic temperatures during peak summer. Proper attic ventilation and a modern radiant barrier reduce the actual cooling-load impact to less than 20 dollars per month in most homes.
Very similar in daylight. The gray-family SKUs across Atlas, GAF, CertainTeed, IKO, and Owens Corning sit within a small tonal window. Subtle differences in granule blend (some lean cool blue, others lean warm slate) become visible only side by side. Use the Compare tab to see direct hex deltas.
Generally yes. Atlas's algae-resistance package uses copper- or zinc-infused granules that inhibit the most common Florida algae strain (Gloeocapsa magma). Expect clean performance for the warranty window with normal cleaning; in heavy-shade or low-airflow installations occasional soft-wash maintenance helps. Source: NRCA Algae Discoloration field guidance.
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#9A9B97 · gray · cool blue undertone 
