Dark pattern

A dark pattern is not a mistake. Every ingredient of it is something an honest interface also uses: emphasis, defaults, wording, placement, timing. What makes it dark is the direction those tools are pointed. The glowing button is the one that earns revenue, the greyed link is the one that does not, and the wording of the refusal is written to make refusing feel like an admission. Nothing on the screen lies. The screen is simply arranged so that the fastest, calmest path through it is the one the reader would not have picked if the two options had been drawn as equals.

Harry Brignull coined the phrase in 2010 and catalogued it at darkpatterns.org, which now runs as deceptive.design under a name that survives translation and does not lean on “dark” as a synonym for bad. The catalogue is the useful part: the umbrella word gets you into the argument, and the specific word wins it. Confirmshaming makes declining an insult (“no thanks, I like paying full price”). A roach motel is easy to enter and deliberately hard to leave, which is what a one-click subscription with a phone-only cancellation is. Drip pricing hides fees until the last screen. Preselection ticks the box for you. Misdirection puts the decoy where the eye lands first. Naming the specific one is what turns a design review comment from taste into a finding.

The vocabulary now has legal weight, which is why it is worth using precisely. The US Federal Trade Commission published a staff report on dark patterns in 2022 and has brought enforcement actions over subscriptions that were hard to cancel. In the EU, the Digital Services Act bans interfaces that distort or impair a user’s ability to make free choices, and consent under the GDPR has to be as easy to refuse as to give, which is what makes a cookie banner with a prominent Accept and a buried Reject a compliance question rather than an aesthetic one. Accessibility rules bite too: a decline link that fails contrast fails WCAG whatever its intent was.

The honest test is not whether the interface is persuasive. Persuasion is allowed and is most of what design does. The test is whether the design works against the person’s own interest and would stop working if it were explained to them out loud. An interface that gets more sign-ups when the cancel path is hidden is not a better interface. It is the same interface with a hostage.