Technical Reference

What a Container's Colour Tells You — and What It Doesn't

The first thing anyone notices about a shipping container is its colour, and it is the least informative thing about it. Colour records where a box has been, not what state it is in. A faded unit in a well-known livery can be sound; a bright one can be patched. What the colour does tell you — provenance, and roughly how the unit left its last fleet — is worth knowing, and so is what you are allowed to paint over.

Colour is provenance, not condition

A container wears the colour of whoever last operated it. Carriers paint their fleets in house liveries; leasing companies use their own stock colours; factory units leave in whatever the order specified. None of that says anything about corrosion, floor condition, door seals or roof dents — the things that decide whether a box is worth buying.

Buyers routinely read a tired-looking colour as a tired container and a fresh one as a good one. Both readings are unreliable. Paint is the cheapest thing on a container to renew and the last thing to fail.

Where the colour comes from

Three sources, and they behave differently.

Carrier liveries

Carrier liveries are the recognisable ones — a shipping line's house colour, applied fleet-wide and repainted through the unit's working life. When a box leaves that fleet, the line's marks and logo are normally required to be removed or blanked; a carrier does not want its identity on equipment it no longer controls.

Lessor stock colours

Lessor stock colours are quieter — greys, off-whites, muted blues — because a leasing company's box has to look neutral in anyone's operation. A unit in a plain colour with a lessor's prefix has usually come off lease rather than out of a carrier fleet.

Factory colours

Factory colours apply to one-trip and new units, which leave the plant in whatever the buyer specified. That is why a new container often arrives in a colour nobody recognises.

Liveries change. Lines merge, rebrand and repaint, and a colour that identified one operator a decade ago may identify another today. Treat colour as a hint about provenance, and the BIC prefix on the container number as the fact.

Why a one-trip unit is rarely the colour you expected

A one-trip container has made a single loaded voyage from the factory, usually on a lane that needed equipment repositioned anyway. It has not spent years in a carrier fleet, so it carries no accumulated livery — just whatever coating the order called for.

For a buyer this is the point at which colour and condition genuinely decouple. A one-trip box in an unremarkable colour is, structurally, the best unit on most yards.

Repainting: the paint is not the work

Containers are built from weathering steel (corten) and finished with marine-grade coatings designed for a decade of salt exposure. Repainting one properly is mostly preparation: removing old markings, treating surface corrosion, and getting a sound surface for the new coating. Rolling fresh paint over a poorly prepared side buys you a season.

What drives the effort is the state you start from and how much old marking has to go — not the size of the box.

What must stay legible, whatever else you paint

The container number and its check digit.
The CSC safety approval plate — painting over it is a compliance problem, not a cosmetic one.
ACEP or PES markings, which record the inspection scheme the unit runs under.
Any hazard or maximum-gross markings required for transport.

A repainted container that has lost its plate or its number is no longer straightforward to move internationally, and restoring the identity is not a paint job.

When colour actually matters

For sea transport, almost never. For everything else, sometimes.

Conversions and branding

Site offices, storage on a client's yard, retail or event units. Here colour is the point, and the sensible order is to buy on condition and repaint, rather than to hunt for a box that is already the right colour.

SOC movements

A shipper-owned container still wearing a carrier's livery invites questions at gates and depots, because the marks say one thing and the paperwork says another. Removing the previous operator's identity avoids an argument that costs time rather than money.

Uniformity across a batch

If units will sit together in view of a customer, matching them matters more than any individual colour.

What actually tells you the condition

Grade, not colour. The grade vocabulary — CW, IICL, WWT, As-Is, One-Trip — describes structural and watertight condition, and it is what a price should be built on. Read it together with the CSC plate for age and inspection scheme, and with the unit's last interchange report for what was found at gate-in.

Container Grades Explained CSC Plate Explained

Common Questions

Frequently Asked Questions

They record provenance, not condition. A carrier livery says the box came out of that line's fleet; a plain grey or off-white usually says it came off lease; an unfamiliar colour often means a one-trip unit that left the factory in whatever the order specified. None of it tells you about corrosion, floor condition or door seals. The container number's BIC prefix is a far more reliable indicator of who owned it than the paint.

Because it has not been in anyone's fleet long enough to be painted into one. A one-trip unit makes a single loaded voyage from the factory and arrives in the coating its order specified, which is frequently a colour no carrier uses. It is the case where colour and condition decouple most sharply: an unremarkable-looking box that is structurally the best unit on the yard.

Yes, and it is routine for conversions and for units that will sit in view of a customer. The work is in the preparation rather than the paint — removing old markings, treating surface corrosion, and getting a sound surface for a marine-grade coating. Painting over a poorly prepared side lasts a season. Buy on condition and repaint; do not hunt for a box that happens to be the right colour already.

The container number and its check digit, the CSC safety approval plate, the ACEP or PES inspection markings, and any hazard or maximum-gross markings required for transport. Covering the plate is a compliance problem rather than a cosmetic one: a unit whose identity or approval cannot be read is no longer straightforward to move internationally, and restoring it is not a paint job.

Far less than grade, age and where it is standing. A buyer paying attention prices on structural and watertight condition, on the CSC plate, and on whether the unit is in a depot they can collect from. Colour matters commercially in two narrower cases: when the unit is destined for a conversion where appearance is the product, and when a previous operator's livery still has to be removed before the box can be used.