Pink for October is an initiative started in August of 2006, in which sites all over the world change their templates to include the color pink, in support of Breast Cancer Awareness, because October is the month of Breast Cancer Awareness.
“Web sites will Go Pink during the month of October to bring attention to Breast Cancer Awareness Month, get people talking about breast cancer, and raise money for research.” - Official Pink for October site if you’re not a web designer but would like to “go pink” with the rest of them, don’t worry. There are plenty of web templates out there with pink themes.