PlantUML: change the background color of a participant in sequence diagram

Using #color syntax, we can set the background color of a participant.

 

Example

boundary boundary1 as bndry1 #blue
control control1 as con1 #FFFF00

 

participantColor.txt

@startuml

' Participants definition
participant participant1 #green
actor actor1 as actr1 #red
boundary boundary1 as bndry1 #blue
control control1 as con1 #FFFF00
entity entity1 as ent1 #FF00FF
database database1 as db1 #00FFFF
collections collections1 as col1 #445566

participant1 -> actr1 : To actor
participant1 -> bndry1 : To boundary
participant1 -> con1 : To control
participant1 -> ent1 : To entity
participant1 -> db1 : To database
participant1 -> col1 : To collections

@enduml

 

In the above snippet #green, #red, #blue, #FFFF00 etc., represent colors. Above snippet generate below image.

 

 

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