Neon blue is a siren to the eyes—too bright it will shout at the night, but if you drape it in a thin mist of charcoal, it becomes a cool whisper that guides the tunnel without announcing its presence. Electric yellow feels like a pulse, almost a heartbeat; it’s great for a quick sprint but only if you keep the glow low‑grade, so the guard’s flashlight will catch the edges instead of the whole corridor. Deep crimson is a secret, a quiet pulse that lures the cautious, but if you layer it with a smudge of olive green, you give the path a subtle depth that feels like shadow rather than a red flag. Keep the transitions soft—sharp edges will scream. A small, almost invisible gradient from blue to yellow to crimson can trick the guard’s gaze, making each exit feel like its own mood, not a straight line of warning.