The best shade sail color

If the reason you are drawn to a dark sail is that you want genuinely deep shade, this is the fabric that delivers it — and it delivers it through density rather than color.

Knitted HDPE at up to 90% UV block, with air flowing through the knit. Ninety percent is the figure to want when the thing being shaded is people. It is a property of the tape-and-mono knit, and it is what produces the dim, cool quality of light people associate with a dark sail.

A 15-year fabric warranty against cracks, splits and tears due to UV degradation. The longest published fabric term we track anywhere on this site. Note what it covers: cracking, splitting and tearing — the structural end of UV damage. No fabric warranty in this category covers color fade, which is worth knowing before you choose a shade you need to stay exact.

Sizes 6 x 15 ft, 6 x 50 ft, 6 x 100 ft and 12 x 50 ft. Sold by the roll, which means you are cutting and finishing the edges yourself. The reward is the density and the warranty.

The fabric to look at if you want real UV protection without making the space underneath feel like a cave.

190 GSM 100% virgin HDPE at 95% UV block, breathable. Ninety-five percent UV block with air passing through the knit — the combination that gives you cool shade rather than a hot pocket. Virgin rather than recycled HDPE is published here, and it matters for fade: recycled stock carries whatever pigment and UV-stabiliser history came with it.

Reinforced stitched seams and stainless steel D-rings at each corner. Hardware sold separately, as it is across the category.

14 sizes, 8 x 10 ft to 16 x 20 ft, three-year warranty. The widest size spread of any sail here, so the color choice is not constrained by only one dimension being available in the shade you want.

The useful point for this page: 95% block at 190 GSM. Compare that with the 90% block at 180 GSM further down. Ten grams of fabric weight, five percentage points of UV block, and nothing to do with color.

Fade is a UV problem, and the fabric with the longest published UV term is the one most likely to still look like the color you chose in year five.

260 GSM HDPE at UV 95, with a seven-year warranty under normal weather conditions. Seven years against a category norm of three. The term does not promise color retention — none of them do — but a manufacturer willing to stand behind the fabric for seven years is making a statement about its UV stabilisation, and UV stabilisation is exactly what slows fading.

A galvanized cable perimeter with A-ring reinforcement. Relevant to this page because a sail that stays taut fades evenly. A sail that sags develops a wear pattern along the fold and a bleached line where water pools and dries repeatedly — fading that reads as damage rather than as age.

The heaviest fabric on this site at 260 GSM. More mass of polymer per square foot means more UV stabiliser per square foot, which is the mechanism behind both the long warranty and slower visible fade.

On the page as the comparison that makes the point: the lightest published fabric here, and the lowest published block rate.

180 GSM polyethylene at UV 90. Against the ColourTree's 190 GSM at 95%, this is the clearest evidence available that block rate tracks fabric weight and knit. Both are available in multiple colors. The block figures differ anyway.

A webbing-reinforced perimeter with no cable, and steel D-rings. Steel rather than stainless at the corners, so expect rust streaks near a pool or in salt air — which on a light-colored sail shows up far more than on a dark one. That is a genuine color consideration, and it is about staining rather than physics.

Three years of warranty. Standard, and the right expectation for a fabric at this weight.