I use Andrew's settings without the red, just a pure grey scale. It's one less colour for my brain to process. Please see below for the RGB values.
Andrew's Tier Colours:
Group 0: 255,255,255
Group 1: 247,239,239
Group 2: 222,222,222
Group 3: 240,198,198
Group 4: 206,206,206
Group 5: 231,173,173
Group 6: 181,181,181
Group 7: 231,148,148
My Tier Colours:
Group 0: 255,255,255
Group 1: 230,230,230
Group 2: 205,205,205
Group 3: 180,180,180
Group 4: 155,155,155
Group 5: 130,130,130
Group 6: 105,105,105
Group 7: 80,80,80
For reference, here is how to change the L2 Tier Color in DAS:
Right-click Montage > Level 2 Config
Click the Color Group X > Define Custom Colors
Enter RGB values in green boxes below: