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Are there color codes or design practices that one should consider while designing interfaces that ask for sensitive information like credit card details or ATM pins?

I have seen several different websites which scream fraud. This probably is because of the way they are designed. Others I have seen look pretty trustworthy to give sensitive details. What are the ways to gain users' confidence? Even a link to some article would help.

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PCI-DSS. – Deer Hunter Jun 4 '13 at 10:48
up vote 3 down vote accepted

Good question!

Stanford Guidelines for Web Credibility should help you. Tips to increase your site's reputation are good, too. Also it could be interesting for you to touch Persuasive Design.


There are several factors which influence site credibility and hence people more likely provide sensitive information.

  1. Modern and consistent visual appearance
  2. Smooth and understandable interaction
  3. Personality – show real person/organisation behind the site, provide not only email, but physical address, phone numbers and other contact and personal info
  4. Social recognition – includes real users' feedback, list of clients, badges from authoritative organizations and other verifying stuff
  5. Some weapons from persuasive design, so called triggers which stimulate people to target behavior
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Alexey, can you summarize the themes of the links you provided? The answers need to be complete in and of itself, rather than people being forced to follow a link to see what it is. – rk. Jun 4 '13 at 12:11

The more professional your site looks, the more trustworthy it is. Think that typo doesn't matter? It does - just as typo's in spam are a red flag for users, it's the same for other interfaces. Keep the number of colors down - if your page looks like mid-90's Geocities, it's not going to encourage people to come.

Keep the language measured and professional - if someone is at the point of paying, they have already made a commitment to buy - focus on making payment easy.

Consider the other pages: If the rest of your site doesn't foster trust, it's unlikely anyone will get as far as paying. Consider where you can be objective - if a site is selling products and always recommending the most expensive, rather than what meets the users needs, it will quickly lose the trust of its users.

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While not the most important, colors do play into how a site is perceived. It is well noted that the color blue tends to invoke a bit more trust in a site.

A few links below as quick sources, a google search turns up alot more info:

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