STANDARD COLOR CODES:
Ground level: tan
Grades: yellow
2nd level: medium green
3rd level: dark green
Mountains: dark green
Industries:  dark gray or white
Roads: brown

TRACK COLOR CODES:
5" straight: white
2-1/2", 1-1/4", 5/8" straight: dark blue

5" rerailer: medium blue
3" bumper: medium blue

9-3/4" curve, half-curve: lt gray
11" curve, half-curve: dark gray
19" curve: violet
Flex track: yellow (see each plan's BOM for radius information)

#4 RH turnout: orange
#4 LH turnout: pink
#6 RH turnout: blue-gray
#6 LH turnout: dark magenta
#4 Wye turnout: olive green

15 deg crossing: pale green
30 deg crossing: yellow
45 deg crossing: medium green
60 deg crossing: pale blue
90 deg crossing: dark brown

Warren truss bridge: dark brown
Deck truss bridge: medium brown
Plate girder bridge: blue-gray

Suggested electrical block boundaries: red