I’ll preface this by saying every design decision should be a decision, based on what will work for your target market. There should be reasons. That said…
In my Seattle-based experience, IT and software are two different animals. If you don’t actually do IT, that may be confusing. Should you include it in your logo? Maybe you should say software development instead?
Well, why not? I’m not criticizing, I’m asking the reason why not blue?
What’s the reason you are determined to use orange? You mentioned vitality and enthusiasm, but if I were a corporation looking for software development, those wouldn’t even be on my list. They don’t help my bottom line.
I would care whether your company develops software that works, doesn’t break, has competitive rates, and offers good support.
True example; I recently decided against joining a certain credit union, because their web graphics were orange, yellow and cartoony. Perfect for a children’s preschool, but I want trustworthiness in a financial institution.
How about replacing the orange with green?
This may be not what you want to hear… but I think you should reconsider some of your design decisions. Consider whether they are about your market, or about you.