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Building a Dry Bag Colour Range

How many colourways a dry bag range actually needs

Start from SKU count, not from taste. A dry bag range multiplies: every shade you add is multiplied by every size and every format in the line. A launch with three sizes and four colours produces twelve SKUs, which one photo day and one warehouse pallet can absorb cleanly. Push the same line to five sizes and six shades and you are at thirty SKUs, and the marginal shade now costs more in working capital than it returns in sell-through.

The practical ceiling for a first season is four to six colourways, and the floor is three. Below three the range looks unfinished on a shelf and gives a retailer nothing to differentiate with; above six the slowest two shades will account for under 8% of units while consuming roughly a quarter of the inventory budget. Ranges that start narrow can always add a seasonal shade in year two once real sell-through data exists.

The 70/20/10 split: core, accent and seasonal colours

Splitting the range by expected unit share keeps the line honest. Core neutrals are the shades that reorder every season and never go on markdown: black, olive, charcoal grey. Accents are the shades that make the product recognisable in a photograph: safety orange, mint, cobalt. Seasonal shades are the experimental ones, tied to a specific trend window and dropped if they miss.

The split also dictates how you buy fabric. Core colours are bought in full rolls against an annual forecast because you know they will run again; accents are bought in half rolls; seasonal shades are bought once, at the minimum, and written off if they do not repeat. That difference alone changes the landed cost of a bag by several percentage points before any construction decision is made.

Choosing core neutrals that sell in every channel

Black is the anchor of every waterproof range for a reason that has nothing to do with fashion: it hides salt staining, scuff marks and sunscreen residue, and it photographs consistently under retail lighting. Expect 30% to 40% of unit volume in black for paddlesport and dive-adjacent channels. Olive and charcoal take most of the remainder in outdoor and hunting-adjacent channels, where a bright bag is a liability rather than an asset.

Neutrals are also where consistency matters most, because they are the shades a buyer reorders blind in year three. Lock the reference under three light sources before approval: D65 daylight, 4000 K retail LED and a warm 2700 K showroom source. A charcoal that reads neutral under D65 and violet under retail LED will generate returns even though every lab number passed, which is metamerism rather than a colour error.

Accent colours: where brightness earns its keep

Bright shades do three jobs on a waterproof product. They make a bag findable in moving water, they make a range recognisable in a feed thumbnail, and they let a buyer price a premium tier without changing the tooling. A safety orange or signal yellow dry bag is genuinely easier to spot 200 m offshore than an olive one, and that is a functional claim you can defend rather than a styling preference.

The trade-off is heat and staining. A saturated orange surface sitting in 32 °C direct sun measures roughly 12 °C to 18 °C cooler than the same bag in black, which matters if the product doubles as a cooler, but light shades show sunscreen, tanning oil and clay far more readily. Pick light accents for products with a short service window and reserve dark neutrals for rental fleets where appearance after two seasons is the buying criterion.

Matching colour across fabric, film, webbing and hardware

A colourway is not one colour; it is four substrates that have to agree with each other. The coated shell takes dye as a woven textile, the TPU film is translucent and shifts darker over a printed face, the webbing is usually polyester or nylon with a different dye affinity, and the hardware is moulded POM, anodised aluminium or coated steel. Match them in daylight on a real assembly, not on separate swatch cards.

Set a numerical tolerance for each pairing and write it into the specification. A Delta E of 1.0 or better under CIEDE2000 is achievable between shell and webbing when both come from the same dye house; film over print typically lands at 1.5 to 2.5 because the laminate adds optical depth; hardware will never match textile exactly and should be specified as a deliberate contrast or as a neutral black. The ISO grey scale and the ASTM colour-difference method are the two references buyers recognise.

Colour fastness testing: reading the numbers

Fastness is where a colour range either holds up on the water or generates a season of complaints. The four tests that matter for a waterproof bag are light, rubbing, seawater and chlorinated water. Light fastness is graded 1 to 8 under xenon arc exposure; rubbing is graded 1 to 5 dry and wet; seawater and chlorine are graded 1 to 5 against a grey scale. Anything below grade 4 on rubbing or grade 4-5 on light is a liability in a saltwater channel.

Write the targets into the purchase specification rather than relying on a general claim of colour fastness. A bag that grades 3 on wet rubbing will transfer dye onto a light-coloured rash vest within a single afternoon of use, and that is the kind of failure that ends a retail relationship. Ask for the test report by standard number and batch date, and re-test when the dye house changes.

Solution-dyed yarn, piece dye and print: three routes to colour

There are three ways to put colour on a waterproof shell and they behave very differently. Solution-dyed yarn, also called dope-dyed, has pigment added to the polymer before extrusion, so the colour runs through the fibre rather than sitting on it. Piece dye colours finished greige fabric in a bath. Printing lays ink on the surface, either as a flat shade or as artwork.

Solution-dyed fabric gives the best light and seawater fastness and the lowest water use per metre, but the colour library is narrower and the minimum per shade is higher. Piece dye offers the widest library and the lowest minimum, at the cost of more batch variation. Printing is the only route for artwork and the only route with a genuinely low minimum, which is why a seasonal or test shade usually starts as a print.

Camouflage and pattern: scale, repeat and licensing

Pattern behaves like a colourway in a range plan but costs like artwork. A camouflage or graphic repeat needs a defined scale relative to the product, a repeat length that does not land an obvious motif seam across the panel, and a registration tolerance, typically plus or minus 1.5 mm, that the print method can actually hold on a coated face. On a 5L bag a large hunting-scale repeat reads as a single muddy block; the same artwork at 60% scale reads as pattern.

Licensed patterns carry a royalty per unit and a reporting obligation, so they belong in the seasonal tier rather than the core tier. If you want the look without the licence, develop an original repeat and register it, and keep the file in a vector format that scales from a 2L grab bag to a 90L expedition bag without redrawing. Pattern ranges also need their own naming convention, because 'camo' alone is not a SKU identifier once you run three variants.

What each extra colourway really costs

The fabric is the least of it. A fifth colourway adds a fabric minimum you may not consume, a label and hang-tag variant, a barcode, a photography set, a warehouse bin, and a forecasting line that will be wrong in both directions. In ranges we have costed, the marginal shade adds between 4% and 9% to the landed unit cost at low volume, most of it in fabric minimums and write-off risk rather than in material.

The cheapest way to add visual variety is to change a component rather than a shell. A second webbing colour, a contrast weld line, or a different buckle finish refreshes a product at a fraction of the cost of a new fabric buy, and it does not add a fabric minimum. That is why a well-planned range often has four shell colours and six visible variants.

Mapping colourways onto sizes and formats

Not every colour should exist in every size. Small grab bags sell on visibility, so bright accents earn their place at 2L to 10L. Large expedition bags sell on durability and price, so 60L and above should run in two neutrals only. Applying that filter typically removes a third of the SKUs from a full matrix without removing any shade from the range.

Format matters as much as size. A duffel or tote is carried in public and photographed in lifestyle settings, so it can carry an accent that a hatch bag cannot. A roll-top that lives inside a kayak hatch is never seen, and the correct decision there is one neutral that hides abrasion. Build the colourway matrix as a grid and delete the cells that have no channel behind them.

Retail and e-commerce presentation of a colour range

Colour is the first thing a shopper filters on and the first thing that disappoints them if the photography is wrong. Shoot every colourway under the same lighting setup and against the same neutral background, and include at least one frame where two shades sit side by side so the difference is unambiguous. Swatch chips rendered from hex values are a poor substitute and are the single biggest driver of shade-related returns online.

Naming does real work too. Descriptive names beat abstract ones in search: 'olive' and 'signal orange' are findable, while 'forest whisper' is not. Keep the name stable across seasons even if the Pantone reference moves slightly, because a returning buyer searches by the name they remember. Where a range includes reflective detailing, note it per colourway, since a reflective accent reads very differently on black than on mint.

Colour decisions that survive a product refresh

Ranges get refreshed every two to three seasons, and the colours are usually the part that changes. Protect the programme by keeping at least one neutral constant across refreshes so a retailer never has to change a planogram entirely, and by archiving signed physical references for every approved shade. A digital hex value is not a reference; fabric batches drift and the physical swatch is what a lab dip gets judged against.

Refresh accents more often than neutrals. A seasonal accent that is clearly labelled as limited keeps the range feeling current without destabilising the core, and it lets you test a shade at low volume before promoting it. When an accent earns its way into the top five SKUs by unit volume, graduate it into the core tier and buy the fabric as a full roll.

A colour brief you can hand to a production partner

• State the range size: number of colourways, and which sizes each one appears in.
• Give a physical reference for every shade, not a hex value, and name the light source used for approval.
• Set the Delta E target per component pairing: 1.0 for shell to webbing, 1.5 to 2.5 for film over print.
• List the fastness targets by standard: ISO 105-B02 light 4-5, X12 rubbing 4 dry, E02 seawater 4.
• Name the route to colour per shade: solution-dyed, piece dye, digital print or screen print.
• Specify hardware as a deliberate contrast or as neutral black; do not ask for a textile match.
• Confirm the fabric minimum per shade and who carries the residual if a shade is dropped.
• Fix the naming convention and the pattern scale rules before artwork starts.

A brief in that shape removes most of the sampling round trips that slow a colour programme down. Our team has produced waterproof bags since 2014 in an SGS-verified 4,950 m2 facility with 137 staff across seven production lines, and the colour conversations are always the longest part of a project because a shade has to survive fabric, film, hardware and retail lighting. Minimum order is 500 pieces per colourway, sampling runs 6 to 10 working days and bulk runs 35 to 50 days from FOB Xiamen.

Two more references are worth putting in the brief. The ASTM colour and appearance standards give you a defensible method for measuring Delta E when a dispute comes up, and the ISO 105 series is the language every testing laboratory already speaks. Then sanity-check the grid against how the product is actually used: the colour matching guide covers substrate drift in more depth, the pattern guide covers artwork scale, and the trend notes cover what is currently moving in outdoor channels. Our roll-top range and the wider product line show the same shades applied across formats, which is the quickest way to see whether a colourway survives the jump from 5L to 90L.