BIM Technical Standards: MEP Color Mapping

In an effort to achieve consistency across files, the GSA Region 5 has developed color assignments for MEP systems. All project data should conform to these to the extent possible within the authoring application.

Standard

• All MEP files, regardless of software authoring platform, must follow the color coding defined on this page.
  • If a data format does not support application of color by element they will be allowed.
  • When working in a platform that supports multiple color schemes, such as Revit, only the master, discipline 3D views must have the color scheme.
• When using AutoCAD, the ACI or RGB color number are permitted.

Common Piping and Plumbing Systems

System	Revit Color	AutoCAD Color	RGB
Compressed Air	5	5	0,0,255
Storm Drain	128-000-255	190	128,0,255
Storm Drain Overflow	219-183-255	191	219,183,255
Domestic Cold Water	0-63-255	160	0,63,255
Domestic Hot Water Return	255-170-170	11	255-170-170
Domestic Hot Water Supply	255-060-060	10	255,60,60
Natural Gas	2	2	255,255,0
Sanitary	255-127-0	30	255,127,0
Sanitary Vent	255-191-0	40	255,191,0
Unknown Pipe	076-038-038	17	76,38,38

Unknown Pipe is only to be used when it is absolutely necessary. Only when an existing pipe must be shown, but it's contents are unknown, should a pipe be classified as unknown.

HVAC Systems

System	Revit Color	AutoCAD Color	RGB
Heating Hot Water Return	255-0-127	230	255,0,127
Heating Hot Water Supply	255-0-63	240	255,0,63
HVAC - Exhaust	3	83	103,165,82
HVAC - Outside	0-191-255	140	0,191,255
HVAC - Return	0-255-127	110	0,255,127
HVAC - Supply	000-127-255	150	0,127,255
Condensate - Gravity	127-255-000	70	127,255,0
Condensate - Pumped	0-104-78	126	0,104,78

Fire Protection Systems

System	Revit Color	AutoCAD Color	RGB
Fire Protection - Sprinkler	1	1	255,0,0
Fire Protection - CO2	255-0-191	220	255,0,191
Fire Protection - Halon	255-170-234	221	255,170,234
Fire Protection - Inert Gas	189-0-141	222	189,0,141

Steam Systems

System	Revit Color	AutoCAD Color	RGB
Steam - High Pressure	0-94-189	152	0,94,189
Steam - Medium Pressure	126-157-189	153	126,157,189
Steam - Low Pressure	170-212-255	151	170,212,255

Heating and Cooling Systems

System	Revit Color	AutoCAD Color	RGB
Chilled Water Return	191-0-255	200	191,0,255
Chilled Water Supply	234-170-255	201	234,170,255
Cooling Tower Water Return	141-0-189	202	141,0,189
Cooling Tower Water Supply	173-126-189	203	173,126,189

Electrical / Telcom

System	Revit Color	AutoCAD Color	RGB
Telecommunication	189-189-126	53	189,189,126
Power Distribution	189-189-0	52	189,189,0
Lighting	255-255-170	51	255,255,170
Security	255-255-0	50	255,255,0

Uncommon / Specialized Systems

System	Revit Color	AutoCAD Color	RGB
Deionized Water	165-165-82	53	165,165,82
Dual Temperature Return	000-063-255	160	0,63,255
Dual Temperature Supply	191-000-255	200	191,0,255
Energy Recovery	082-165-165	133	82,165,165
Fuel Gas	255-127-127	11	255,127,127
Fuel Oil	082-082-165	173	82,82,165
Fuel Vent	165-165-82	53	165,165,82
Laboratory Gas	165-124-82	33	165,124,82
Medical Gas	165-082-165	213	165,82,165
Nitrogen	5	5	0,0,255
Non-Potable Water	165-000-000	12	165,0,0
Potable Water	000-255-063	100	0,255,63
Propane	5	5	0,0,255
Refrigerant Liquid	4	4	0,255,255
Refrigerant Suction	5	5	0,0,255
Reverse Osmosis Water	165-000-000	12	165,0,0
Vacuum	082-165-165	133	82,165,165