Add new background color and transition to mission jumbotron

@jandt-desy We probably need to talk about the colors still.

Probably true... 20% green or 20% blue doesn't work?

next try with a fancy new transition and reduced color intensity.

https://hifis-review-app.hzdr.de/review-apps/hifis-hifis-net/partners-new-color

added 1 commit

• a494b018 - Add new background color and transition to mission jumbotron

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Perfectly fine for me!

merged

mentioned in commit 394f0d06