Three myths about dark mode

The version of this that works is simpler than the version most people imagine. A few things about dark mode that get repeated more often than they get checked.

The measurable part of design is whether people can find what they came for and act on it without hesitating. Assume whoever inherits this will have half your context and none of your patience.

“It only matters for big sites”

Pure black on pure white is harsher than a slightly softened pair. Where this goes wrong is almost never a lack of knowledge. Budget a little time for it every quarter and it never becomes a project of its own.

“We can deal with it after launch”

Sometimes true, usually expensive. Getting it slightly wrong is survivable. Ignoring it entirely is not.

“Our platform handles it”

Shadows stop working in dark mode, so borders carry the depth. Where this goes wrong is almost never a lack of knowledge. If two people in the business would answer this differently, that gap is the actual problem.

The short version

Consistency is the quiet half of design work: it rarely gets complimented, and its absence is noticed immediately. Three things worth confirming about dark mode before you move on:

• Someone can say what the current setup is without going to look
• Respect the visitor's system preference before your own default — and you know whether that is true here
• There is a way to tell whether the last change to this helped

If any of that sounds like a description of your current setup, it is fixable.