Feature request: Pick "Brand Colors" for Flathub

[MayeulC]

Before creating

• This is NOT a gameplay feature from Civ VI, BNW, or outside - see Roadmap
• This is NOT a gameplay feature from Vanilla Civ V or from G&K - If so, it should be a comment in Missing features from Civ V - G&K #4697

Problem Description

"Brand Colors" were introduced for flathub, and are required to be featured on the front page of flathub.org.
As visible on the front page, these colors are used as background colors for the logos.

Here are a few options I could think of (I took the screenshots by changing the listing to look like Unciv in the front page, then tweaked the colors)

Light theme

Color	preview
#8ec3f2 (lightened from the central UI block/unit info)
#fbeb90 (desaturated from the smiley face in the logo)
#8d9dfe (Science background from the icon)

Dark theme

Color	preview
#000032 (Game background, as suggested by @sr66139p in #11375 )
#00800d (Green from the apple in the icon)
#8c60fe (Music background from the icon)

Personally, I think I have a slight preference for the last two options, as they maintain a similar hue across dark/light themes.

Related Issue Links

Discussed briefly in #11375

Desired Solution

We should pick two hex values among the ones suggested above, or suggest others.

Alternative Approaches

I can pick two myself; the choice can always be altered later.

Additional Context

No response

[yairm210]

I like the #8c60fe option - having the color of "uncivilized" be the color of the culture icon has a cute tongue in cheek element to it ;)
Let's go with that, we can always change it later

[Roman19S]

I like #fbeb90. It looks the most legible to me and seems to me like it would be less overused by other apps