buzztone on "[Plugin: Contact Form 7] Style form submit button"

You should be able to make changes at http://www.chrisjauslin.ca/?custom-css as you have started with the following css:

.wpcf7-form input[type="submit"] {
    background-color: #9DA91B;
}

Background colour change is not showing due to following css in http://www.chrisjauslin.ca/wp-content/themes/responsive/style.css

a.button, input[type="reset"], input[type="button"], input[type="submit"] {
    background-color: #F9F9F9;
    background-image: -moz-linear-gradient(center top , #F9F9F9, #F1F1F1);
}

You will need to overwrite this and all other relevant css items in http://www.chrisjauslin.ca/wp-content/themes/responsive/style.css

Use Firebug or Chrome Dev Tools to see what is going on.