Here is how you look at your cover: at full size, on a good monitor, alone, having waited three weeks for it.
Here is how a reader looks at it: 120 pixels wide, in a grid of nineteen other covers, while scrolling, for about a fifth of a second, on a phone.
These are not the same experience, and designing for the first while selling in the second is the most common cover mistake in independent publishing.
Run the test
Export your cover at 120 pixels wide. Put it in a grid with nine or ten current bestsellers in your exact category. Look at the grid on a phone.
Then answer three questions honestly.
Can you read the title? Not "do you know what it says" — you wrote it. Would a stranger read it? Elegant thin typography and long subtitles both disappear at this size.
Does it look like it belongs? Not identical — but does it read as the same kind of object as the books around it? Category conventions are how readers filter, and a cover that ignores them reads as amateur even when it is beautiful.
Does anything remain? Detailed illustrations turn to mud at thumbnail size. Strong covers usually reduce to one shape, one colour relationship and readable text.
The greyscale test
Convert it to greyscale. A great many readers first see covers on e-ink screens, which have no colour at all.
If your cover relies on colour contrast — say, a red title on a green background — it will vanish in greyscale, because those two colours have almost identical tonal value. Good covers hold up in black and white, then use colour to add rather than to carry.
The five-second test
Show it to someone unfamiliar with your book for five seconds, then take it away and ask: what kind of book is that, and who is it for?
If they cannot answer, the cover is not communicating quickly enough. This is not a taste question — you are testing whether the cover does its primary job, which is category signalling.
When to break the rules
Deliberately, and knowing what you are breaking. Standing out in a category grid is a legitimate strategy, and some very successful covers do exactly that.
The difference is intention. A cover that breaks convention because the designer studied the convention is a strategy. A cover that breaks it because nobody looked is an accident, and readers cannot tell the difference between an accident and incompetence.
Ines Okonjo
Art Director
Part of the editorial team at Winfrey Publishing. Articles here are written by the people who do the work, not by a content agency.
Want this applied to your own manuscript?
A manuscript assessment gives you a written report from an editor in your genre — including when the honest answer is that you should keep revising.
