Meter Decibel Markings

In Preferences/Metering/Appearance, while setting colors, why are the decibel Channel Meter markings marked as digital making them incongruous with the audio meters in the Console View? Is that by design or something else? Just wondering.

EDIT: Hold on, I didn’t mean digital. The markings on the inside of the Channel Meters are digital (faint, faint, faint), but I still don’t understand the coloring meter in the Preferences. It goes to +3, corresponding to 0 on the Channel Meters, but that doesn’t correspond to the Channel Meters decibel markings, it corresponds to +6. I’m totally confused now.