When I go to google, select more the words under the icons are in yellow.
That is except answers which is in black.
I find it hard to read the yellow text. Can it be changed?

Are you in the cashe view?  It seems like your answers are getting highlighted

Hi
Its not only in Google that I get these yellow characters. It happens
on other web sites. Always when there is a reference to something. By
the way what is cashe view.

When you search with Google's toolbar it has the option to highlight
all the words that you searched for - in the context of the page you
are viewing. This will cause words to be highlighted in yellow, red,
green....

Cache view is used by clicking on Cached when searching for something
on Google, this is a cached version, or a "snapshot" of the site that
you are visiting. Useful when the site goes down for any reason and
you don't require any data that needs to be constantly updated - the
cached version of the page could be a very old version of the page.