You can sometimes change the colour through Admin/ Edit Theme/Theme Settings or in more difficult cases, the theme's CSS file. You do have to be careful with the latter, because the CSS colour setting may also be used on other parts of your site and you'll get white where you don't want it.

White is: #fffffff (six f's)

If you don't know how to do it, changing CSS elements can be a bit daunting. Tell me the Theme you are using because every theme is different. If it's a freebie, I'll download it, change the colour and send the modified theme to you. It may transfer as a PM attachment, but I can't guarantee it.

Hi Tiff,

I've sent the modified file. Hope it works.

John

Tiff have your resolved your problem with John's file?

Hi Ross, Tiff thanked me via PM. He said the file is ok. I changed all instances of grey to white. Thanks. John

Alright. I'm going to mark this post as solved. 

Hi,

I got it fixed! I found css file.. It easy! not hard. :-)

Thanks to Ross and John

You are welcome Tiff.