Remove Opera Mobile blue border around <a> links

Question

I have an webapp, where buttons are created with <a> elements, and all have href set to #. I want to remove blue border around <a> links during mouse click, because Opera Mobile annoyingly highlights all <a> elements, which has same href set.

Example picture:

How can I remove it?

Answer 1

I think Opera may be looking for something a little stricter on the outline element.

Try:

a:focus { outline:0px solid #fff; }

The 'solid' and 'colour' will be ignored.