Are both garage door sensors supposed to be the same color?

No, on most modern openers the two safety sensors are not supposed to be the same color. On LiftMaster, Chamberlain, and Craftsman systems, one sensor glows amber or orange and the other glows solid green. The amber sensor is the sender, which constantly emits an invisible infrared beam, and the green sensor is the receiver, which lights up when it sees that beam. Both lights should be on and steady when the door is working correctly. If both sensors are green, your unit is likely a Genie Safe-T-Beam, where one shows red and the other green. If a sensor is off, blinking, or both colors look wrong, you have an alignment, wiring, or power problem rather than a color issue.