Posts by Paul Olyslager


In our 4-part series about Call to Action buttons, we have come to the 3rd post in which I explain the impact of shape and size on the effectiveness of a button. With the help of several studies I will show you the best practices in order to increase the CTR (Clickthrough Rate) of the… continue reading

What can I tell you, I just love to read about web design. Because I could spend a small fortune on books, I find it very useful and wise to read a few reviews before I actually buy a book. Instead of spending my time looking for the next purchase, I thought I’d write a review for a change… continue reading

In the first part about Call to Action buttons, I talked about the usage of color and how it affects the user’s behaviour. As mentioned in this article, a CTA-button has 4 important tools: placement, shape (and size), message and color. In this second part I would like to give you some pointers about the… continue reading

By combining scientific studies on color with some design principles, you can create a great call-to-action button for your website and improve its conversion rate drastically… continue reading

A collection of useful resources on user interface design including easy-to-navigate pattern libraries and interesting articles, all nicely categorized into 4 parts: blogs, Flickr groups, articles and books… continue reading

I'm the creator and editor of, a blog about on Web Design, User Experience and Usability. Currently I'm working as UX Manager for a leading supplier of nutrients and supplements to the European market based in Berlin, Germany. Follow me @paulolyslager or google+.