The Short Answer
Test your visuals by showing them to real members of your target audience, in real contexts, and watching their reaction. Put your logo, colors, and key designs in front of a handful of people who match your ideal customer, see what impression they form, and check that the look reads clearly on the screens and materials where it will actually appear.
Show It to the Right People
Feedback only matters if it comes from people like your customers. Friends and family will be kind but unhelpful. Find a few people who match your target audience and ask what the visuals make them think and feel. If the impression they describe matches what you intended, the visuals are working. If not, you have learned that cheaply, before launch.
Test in Real Contexts
A logo that looks great in a design file can fall apart on a phone screen, a sign, or a social avatar. Mock up your visuals where they will really live (your website, a business card, a profile image) and check that they stay clear and recognizable. Real-context testing catches problems that isolated previews hide.
Ask the Right Questions
Do not ask "do you like it?" because taste is subjective and not the point. Ask what the visuals communicate: what kind of business is this, who is it for, how does it make you feel? You are testing whether the visuals send the intended message, not whether people find them pretty.
Look for Patterns, Then Refine
One person's opinion is noise; the same reaction from several people is signal. When a consistent impression emerges that does not match your intent, adjust and test again. A couple of quick rounds gets you visuals that actually land before you commit to them everywhere.
Where to Start
Visuals are tested against a message, so define it first. The Growth Navigator free tier locks your message, and Core ($247/mo) builds the identity around it. Start free.