For a button gradient using CSS, how could I possibly combine #fff with a purple to achieve the white/purple background somewhat close to the edges in this image?

Thanks!
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
Using the tool @Diodeus linked, I created a setup that you can tweak:
http://www.colorzilla.com/gradient-editor/#a8a8a8+0,2300b2+100;Custom
Here it is in action:
http://jsfiddle.net/vCYUX/1/