If you ever wanted an SEO friendly solution to blur text, there are a number of ways to do so. One way you'll most likely use is a CSS3 filter with the blur function like the example below.
This works fine. But you must also know the compatibilty issues that exist with using CSS FIlter.
Browser support for CSS3 filter. Source
Although a strong case can be made for this in the sense that it has a wider range of use. You can use this to blur images or any kind of content really. But for blurring text, we'll consider another method.
There is a hack/trick which you can use to achieve a similar blur effect for text content using a combination of color and text-shadow CSS properties with better browser compatibility. Reference the example below
Better compatibility with text-shadow Source.
The idea here is make the color transparent and use a color having relativley high contrast with the background for the text-shadow property. It then creates the illusion of blurring. You can see another sample below using dark background instead.