I looked at your image within your site, (
http://www.dvhdesign.co.uk/ I'm assuming)
I don't think the aqua blue goes properly with the purple. The font for design is nice, and the DVH letters stand out in their boxes.
However, I don't think the logo is appropriate based upon its placement on your webpage. I wouldn't have it dead center, especially because its just a square in the middle with nothing along the sides. You should try and use your heading space better.