Use the following chart for a visual representation of SRM Color and Beer Color Name.
EBC 4SRM 2RBG #FFD878
EBC 6SRM 3RBG #FFCA5A
EBC 8SRM 4RBG #FFBF42
EBC 12SRM 6RBG #F8A600
EBC 18SRM 9RBG #E58500
EBC 24SRM 12RBG #CF6900
EBC 30SRM 15RBG #BB5100
EBC 35SRM 18RBG #A63E00
EBC 39SRM 20RBG #9B3200
EBC 47SRM 24RBG #821E00
EBC 59SRM 30RBG #5E0B00
EBC 79SRM 40+RBG #36080A
From wikipedia.org:
See glossary for definitions of EBC and SRM
EBC = SRM * 1.97
SRM = EBC * .508