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Colors

You can use specify fill and line colors either:

• with its standard name or CSS name
• using HEX value (6 digits): #RRGGBB
• using HEX value (8 digits) with alpha compositing or RGBA color model: #RRGGBBaa
• using short HEX value (3 digits): #RGB (so #ABC means #AABBCC)
• using very short HEX value (1 digits): #x which is a shortcut for #xxxxxx (so you get some gray)

A special color values: transparent can be used, synonym of transparent black (#00000000).

Example on Gantt Diagram:

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@startgantt [Activity1] lasts 5 days [Activity2] lasts 5 days [Activity1] is colored in White/Red [Activity2] is colored in Silver/SeaGreen [Activity1] -> [Activity2] @endgantt

Example on Sequence Diagram:

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@startuml actor Bob #Red/Yellow actor Alice #FF0000/FFFF00 Alice -> Bob : hello @enduml

This uses Color Gradient, see next section. See also skinparam.

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Color gradient

You can also use color gradient in background, with the following syntax: two colors names separated either by:

• |,
• /,
• \, or
• -

depending the direction of the gradient.

See the previous section, and Color gradient on Class diagram page.

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Automatic font color

The special value automatic can be used for font (text foreground) color. In that case, the color is either black or white, depending on the current background.

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@startuml skinparam classFontColor automatic skinparam classHeaderBackgroundColor #444 class classA { testMethodCode() } class classB #fff { testMethodCode() } @enduml

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Color with preprocessing

You can manipulate color with Preprocessing, and the Builtin functions:

Name	Description	Example	Return
%darken	Return a darken color of a given color with some ratio	%darken("red", 20)	#CC0000
%is_dark	Check if a color is a dark one	%is_dark("#000000")	true
%is_light	Check if a color is a light one	%is_light("#000000")	false
%lighten	Return a lighten color of a given color with some ratio	%lighten("red", 20)	#CC3333
%reverse_color	Reverse a color using RGB	%reverse_color("#FF7700")	#0088FF
%reverse_hsluv_color	Reverse a color using HSLuv	%reverse_hsluv_color("#FF7700")	#602800

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View colors in PlantUML

A user has recently created an image to display all names colors used by PlantUML. (We thank him by the way!)

So a new feature has been added to print all those colors using a special diagram description:

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@startuml colors @enduml

It is also possible to print a palette of colors close to some other color (using its name or HEX value).

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@startuml colors chocolate @enduml

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Archimate colors

Archimate uses color names that reflect the purpose of a node:

• Application
• Business
• Implementation
• Motivation
• Physical
• Strategy
• Technology

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@startuml skinparam minClassWidth 125 skinparam nodesep 10 skinparam ranksep 10 rectangle Application #Application rectangle Business #Business rectangle Implementation #Implementation rectangle Motivation #Motivation rectangle Physical #Physical rectangle Strategy #Strategy rectangle Technology #Technology @enduml

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PlantUML colors

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@startuml skinparam minClassWidth 200 skinparam nodesep 10 skinparam ranksep 10 rectangle "ClassColor" { rectangle "Class_C_Background\n #ADD1B2" #ADD1B2 rectangle "Class_N_Background\n #E3664A" #E3664A rectangle "Class_A_Background\n #A9DCDF" #A9DCDF rectangle "Class_I_Background\n #B4A7E5" #B4A7E5 rectangle "Class_E_Background\n #EB937F" #EB937F } rectangle "DefaultColor" { rectangle "BackGroundColor_Default\n #FEFECE" #FEFECE rectangle "LineColor_Default\n #A80036" #A80036 rectangle "Legend_BackGroundColor\n #DDDDDD" #DDDDDD rectangle "//TBC//\n..." } @enduml