We’re used to hearing intercom messages in big box stores like Target and Costco as well as grocery stores. One thing you may not know is that there is a universal color-coded announcement system to alert store employees when something extremely serious is wrong. There are seven, according to Common Cents Mom, and they’re used so shoppers don’t immediately panic.\ CODE RED ‘Code Red’ means there’s a fire, and whether it’s spreading rapidly or not, it’s time to leave. CODE BROWN ‘Code Brown’ means there is an active shooter in the store. It could also refer to other violent acts in play that do…