Depends on the school. The same thing happened the year I applied (i.e., October 15 fell on a Saturday). I was accepted to three schools that weekend. I got my first acceptance via email a few minutes after midnight on Saturday, October 15, then the second via phone call later Saturday morning (around 10AM), then a third one via phone and email on Monday, October 17. If you check the school threads on SDN, you will be able to know in pretty close to real time when each school begins giving out acceptances.
As much as I love the color sky blue, I'm trying (and failing) to imagine how sky blue pants could look good on a guy at a job interview....I think you should stick with the navy suit. You really don't want to stand out in people's minds because of your clothes. What color shirts do you have to go with it? A light blue shirt and mixed tie would look very nice (and conservative) with a navy suit (pants and jacket).