Backgroundcolor transparent doesn't work anymore

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asked Apr 24, 2020 in Question / help by sophiali2008 (120 points)
I updated my plantuml version yesterday and I realized that the " skinparam BackgroundColor transparent" doesn't work anymore. (in my previous version, it worked well)


skinparam BackgroundColor transparent

Bob -> Alice : hello


background is grey and plantuml is always in white.

This feature is removed?

1 Answer

0 votes
answered Apr 24, 2020 by plantuml (278,240 points)

This is a regression. We are actually working on improving transparent/opacity support.

Right now, you can turn about this issue with :

skinparam BackgroundColor #00000000
Bob -> Alice : hello

We are going to fix it anyway soon.

Sorry about that!

commented Apr 24, 2020 by plantuml (278,240 points)
We've just fixed this in last beta and on the online server.

We are currently extending opacity/transparent support. Even if we pay a lot of attention on regression, maybe you'll find some other issue so please post here if you do !

commented Apr 29, 2020 by The-Lu (48,920 points)


Maybe you'll find some other issue so please post here if you do !

Just FYI, for png output:

For some elements (sequence, usecase, deployement), if we have got only one element, that is KO:


But for only one state, mindmap and wbs that is OK:

If it can add some test cases, for help,


asked Apr 30, 2020 in Bug by The-Lu (48,920 points)
edited Apr 30, 2020 by The-Lu
Backgroundcolor transparent doesn't work for only some element (only for alone element)