MLB Team Colors below. Copy and paste this into the Tableau Preference File
#FF0028
#000000
#FFFFFF
#A71930
#E3D4AD
#000000
#FFFFFF
#FFFFFF
#13274F
#CE1141
#0E3386
#CC3433
#FFFFFF
#333366
#C4CED4
#FFFFFF
#000000
#FFFFFF
#005A9C
#FFFFFF
#000000
#F9423A
#FFD100
#0077C8
#FFFFFF
#182B49
#92754C
#FFFFFF
#002D72
#FF5910
#FFFFFF
#000000
#FDB827
#FFFFFF
#BA0C2F
#003087
#FFFFFF
#041E42
#B3A369
#000000
#FD5A1E
#E6D8AF
#FFFFFF
#C41E3A
#000066
#FEDB00
#FFFFFF
#AB0003
#11225B
#000000
#ED4C09
#FFFFFF
#BD3039
#0D2B56
#FFFFFF
#132448
#CCCCCC
#FFFFFF
#092C5C
#8FBCE6
#FFFFFF
#F5D130
#134A8E
#1D2D5C
#FFFFFF
#E82A1E
#000000
#CCCCCC
#FFFFFF
#002B5C
#E31937
#FFFFFF
#0C2C56
#FF6600
#FFFFFF
#004687
#74B4FA
#C09A5B
#FFFFFF
#042462
#D31145
#CFAB7A
#FFFFFF
#002D62
#EB6E1F
#FFFFFF
#BA0021
#003263
#FFFFFF
#C4CED4
#003831
#EFB21E
#002B5C
#006C67
#C4CED4
#FFFFFF
#003278
#C0111F
#FFFFFF
Also,
here
is a link to download the text file containing the codes for the custom color stuff in Tableau.