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Design On-Brand Pop-Up Forms with AI

Three pop-up concepts from one product photo, built in a brand's real colors instead of a guess.

By Anne Reyes · · 5 min read

A pop-up form is the first thing a shopper sees on your site that either looks like your brand made it or looks like every other pop-up tool's default template with your logo dropped in. Most brands ship the template, because the alternative is a designer, a brief and a week of back and forth for one screen.

This replaces that week. Give Claude one product photo and a locked color palette, your own if you have one, or a brand's real published colors if you are still finding yours, and it will design the layout, the headline hierarchy and the button around them in minutes.

Below is the whole method, start to finish. You are not opening design software. You are describing what you want in plain English and looking at what comes back.

Email sign-up pop-up form with a full-bleed editorial photo on top and a cream panel below with the headline the glow starts here, an email field and a get 15 percent off button

Concept oneFull-bleed photo, copy panel underneath.

What is inside Two prompts that take you from a bare product photo to three finished pop-up concepts, each one an image you can hand straight to whoever builds it into your pop-up tool. The one line that forces the three concepts to actually look different from each other. And the follow-up that fixes the one you keep without starting over.

The whole thing on one page

StepWhat you doHow long
1Hand Claude your product photo and your color palette3 min
2Ask for pop-up concepts, not just "a pop-up"2 min
3Make the concepts genuinely different from each other3 min
4Refine the one you are keeping1 min

What do you need before you start?

  1. One product photo. A plain hero shot or flat lay is enough. Claude is designing a layout around it, not retouching it, so it does not need to be studio quality.
  2. A locked color palette. Your own brand's hex codes and font if you already have them, or the real published colors of a brand whose look you are borrowing for the exercise. A guess from memory reads as slightly off. The real hex code does not.

Where do you get a brand's real colors, not a guess?

You ask Claude to look them up, the same way you would look up anything else you did not have memorized. Skip this step entirely if you already have your own brand's hex codes on hand.

Prompt 1, the palette check
Look up [brand name]'s actual published brand colors and give me the hex codes. I want their real palette, not a description of the vibe.
Returns exact hex codes with where they came from · Time under a minute · Cost nothing

What do you ask Claude to actually build?

The brief and the photo, in one message, so Claude is designing around your product instead of a placeholder.

Prompt 2, the brief
I want three different email pop-up sign-up forms for [your brand or product]. Use [brand name]'s colors, [hex codes], and a clean rounded sans-serif typeface. Here is the product photo to build the design around: [attach photo]. Each pop-up needs a headline, one short line of supporting copy, an email field, a button, and a small link that lets someone close it without signing up.
Returns a first pop-up concept in the right colors · Time one to two minutes · Cost nothing

"Three different" is doing the heavy lifting in that sentence. Ask for one pop-up and you get one pop-up. Ask for three without saying more and you often get the same layout three times with different words in it, which is the next prompt's job to fix.

How do you get three concepts that actually look different?

You name the layouts instead of leaving it to chance.

Prompt 3, the variety
Make the three concepts genuinely different layouts, not the same design with different copy. For example: one full-bleed photo with the form underneath, one split screen with the photo on one side and the form on the other, and one boxed card with the photo inset at the top and the form below it.
Returns three visually distinct concepts · Time three to five minutes · Cost nothing
Second pop-up concept, a split screen layout with the product photo filling the left half and a cream panel with the headline be first to shop it and an email field on the right

Concept twoSplit screen, photo left, form right.

Third pop-up concept, a white card with rounded corners, a close up product photo inset at the top and the headline your best skin yet with an email field below

Concept threeBoxed card, photo inset at the top.

How do you fix the one you are keeping?

One line, one change, and you say what to leave alone.

Prompt 4, the fix
Remove [the element] from [which concept]. Keep everything else exactly as it is.
Returns the same concept with only that one change · Time under a minute · Cost nothing

Ask for one change on the concept you are keeping, not a full regeneration. That way the version you already approved stays the version you approved, with only the one thing you flagged now gone.

Can you use your own brand instead of a reference?Optional

Yes, and once you have a locked palette this is the version you will run every time after this first one.

Prompt 5, your own brand
Forget the reference brand. Rebuild the three concepts using my own colors, [your hex codes], and my own font, [your font name].
Returns the same three layouts in your own palette · Time two to three minutes · Cost nothing

What does this look like on a real product?

The three pop-ups on this page are the actual output. I gave Claude three product photos and asked for pop-ups styled like Rhode, a brand whose site never reads as a template. The first version of one concept had an internal label baked into the design, a leftover from my own content calendar. Prompt 4, remove that label, keep everything else exactly as it is, and the fix landed with nothing else on the page disturbed.

What is the prompt chain, in order?

#PromptWhat you get
1The palette checkA brand's real hex codes, if you are borrowing a look
2The briefA first pop-up concept in the right colors
3The varietyThree concepts with genuinely different layouts
4The fixThe one you are keeping, refined by exactly one change
5Your own brand, optionalThe same layouts rebuilt in your own palette

What makes the difference?

The checklist before it goes live


Do you need design software to build a pop-up this way?

No. Claude generates the finished pop-up as an image inside the chat, and that image is what you hand to whoever builds it into your pop-up tool. You are describing the design in English, not opening a canvas.

Can you use another brand's colors for your own pop-up?

You can use a brand's real published colors as a styling reference while you are finding your own look, the same way a mood board works. Once you are shipping the pop-up to real shoppers, rebuild it in your own brand's palette and your own product name, since a shopper who lands on a page that echoes another brand too closely is a confusion problem, not a style choice. The optional last prompt in this guide does exactly that swap.

How many pop-up concepts should you ask for?

Three is usually enough to see genuinely different layouts without spending the next twenty minutes comparing near duplicates. Fewer than three and you cannot tell if you like the layout or just the only option you saw. More than four and the differences start blurring together.

What if your product photo is not great quality?

Use it anyway for this exercise. Claude is designing the layout, the color blocking and the copy around the photo, not retouching the photo itself, so a phone shot works for testing which layout you want. Swap in the final studio image once you know which concept you are building for real.

Can Claude turn the finished concept into working code?

Yes, as a separate follow-up once you know which concept you are keeping. Tell it which pop-up tool you use, Klaviyo, Privy, Justuno, or your theme's native pop-up, and ask it to build that concept as the actual embed code. That is outside what this guide covers, since the tool you build for changes the answer.

The three pop-up concepts pictured on this page were built using Rhode's own publicly available product photography as a styling reference, and its published palette, Cararra #F1F0ED and Cod Gray #161616. Rhode is not a client of mine, this was not commissioned by or shown to the brand, and I am not affiliated with them. The colors were sourced via Brandfetch. Every prompt above is written with brackets so you can drop in your own brand and your own product photo in place of the reference.

Anne Reyes, brand strategist and founder of Brandworks Studios
About the strategist

Anne Reyes

Brand & AI strategist · Founder, Brandworks Studios

17 years building brands, and I scaled my marketing agency to 7 figures within 2 years, with clients including Amazon, Pier 1, and Dressbarn. I now build AI marketing systems for e-commerce brands through BAIBE, the Brandworks AI Brand Engine. AI does the production. Taste directs it.

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