Set fill color for sequence diagram groups/fragments?

[tlunsfordCXP]

In sequence diagrams in dark mode with darkflagshipterrastruct theme, I'm struggling with the small contrast on the group/fragment boxes.

I see that setting the fill for the group works, but it also changes the text background. Is it possible to set only the box color?

Additionally, can we set the box width for goups? I'm finding that alt groups (i.e., if/else) have different sized boxes based on the group text. Typically I'd expect all groups that live at the same level to have the same width, or at least the option to have the same width.

[alixander]

Do you have an example, of the if/else having different size boxes?

https://play.d2lang.com/?script=Ks5ILEi1UihOLSxNzUtOjU_JTEwvSszlqlDQtVOo5ErNKU61UqjmUlCACFgpZGRyKSgUl1TmpOqlZebkWCkUpaZw1XJxZaahqsvmquUCBAAA__8%3D&theme=0&

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The masking should actually just behave differently for dark backgrounds. Can I change this issue to that? Or would you still want setting fill color and widths, in which case we can keep as separate issue