Are you colourblind?
I saw a '6' and a circle (the circle is extremely clear to me). You can scroll down to my previous post again and compare. Hehe.
Yesterday, I've checked out other websites to test for colourblindness. And the results is, I am colourblind (according to the website). But like I said, I think my case is a mild case of colourblindness because I can still see a little bit of what normal people can see ('real' colourblind people would not have been able to see anything).
For more website tests, you can try:
Oh well, I have come to terms with it already lah. As long as I'm not BLIND, I am happy. =)