Ladies, how do I pick roses for my coworkers on V-Day?

With Valentine's Day coming up, I will be at work with many of my female coworkers. Most of them are married, or they are in some sort of relationship.

I want to be able to but like a dozen roses and give each lady a single rose.

But what color do I pick out to show "love" but not be "romantic"? Or is it still nice to get a Red Rose on V-Day even if you know there is no hidden agenda behind the gift?
Ladies, how do I pick roses for my coworkers on V-Day?
Ladies, how do I pick roses for my coworkers on V-Day?
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