SureNail Strip nailing reinforcement enables 130 mph standard. 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
230 lbs
Standard architectural asphalt
Algae resistance
StreakGuard
10-year algae warranty
Manufacturer
Owens Corning
Toledo, OH · made in the USA
Exposure
5 5/8"
Manufacturer-specified shingle exposure per course
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#505F69
Granule 02Deeper granule#46525B
Granule 03Lighter granule#5B6D7A
Hex
#505F69
Family
Blue / Coastal
Undertone
Cool
Best in
Bright direct sun
How it shifts
Harbor Blue is the cool-end specialty in the Duration catalog. It is a confident, slightly slate-leaning blue that pairs naturally with coastal whites, sage, and natural wood. Specified far less often than gray or brown, but unbeatable on the right elevation.
The profile
The granule blend uses a base of slate-blue with smaller portions of charcoal and storm-gray to keep the cool tone honest. Up close you can see the layering; from the street it collapses into one quiet blue plane.
Where it belongs
Pairs naturally with cool whites, light sage, soft natural wood, and crisp navy accents. Pairs poorly with warm yellows, terracotta, or red brick where the cool undertone fights.
Duration Harbor Blue, 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
Contractor install
Contractor install
AI-rendered example (street view)
Harbor Blue 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)
$120–$139
Home Depot / Lowe's retail snapshot, three bundles per square.
Typical 30-square home
$3,600–$4,170
Materials only. Underlayment, starter strip, and ridge cap not included.
Installed in Florida
$10k–$18k
Full re-roof including tear-off, decking inspection, install, and disposal. Range varies by pitch, square count, and accessibility.
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About Harbor Blue.
Questions homeowners ask before they commit. Answered without sales spin.
A confident cool blue with slate and storm-gray granule accents. In direct Florida sun it reads as a clean blue; in shade it pulls toward cool gray. Far less common than gray or brown in the asphalt category, which is part of the appeal.
Possibly. The color was specified historically to pair with cedar shake, Cape Cod, and coastal-cottage elevations. On a traditional brick or warm-stucco home it can read as out of place. On a contemporary or modern build it works as long as the rest of the palette stays cool.
Some. Blue asphalt shingles use ultramarine and cobalt-toned pigments in the granule blend, and blues drift cooler-and-grayer more visibly than grays or browns under prolonged UV. Expect a slight loss of saturation over the first 10 years in Florida sun. Source: NRCA Asphalt Shingle Manual.
From across the street they can read similarly, especially on overcast days. In direct sun the blue tone separates clearly. If you want a roof that 'reads gray most of the time and blue on bright days,' this is closer to what you want than the cool-gray family.
Slightly. Mid-tone cool asphalt absorbs similar solar heat to mid-tone gray. Florida attic-temperature impact is 5 to 10 degrees Fahrenheit at peak summer versus a light gray. Proper ventilation and a radiant barrier reduce monthly cooling-cost impact to under 20 dollars.
Yes. Blue asphalt SKUs are produced in far smaller volumes than gray or brown. Lead times can be longer and some retailers do not stock them. Plan a 2 to 4 week lead time if you want to specify this color.
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#505F69 · blue · cool undertone 
