Theme Park on One UI 7 Adds Unwanted Green Color to Custom Palettes

[Bastet999]

I’ve been running into a strange issue with Theme Park on One UI 7 and wanted to see if anyone else has experienced this—or found a fix.

Whenever I create a custom theme using Theme Park, everything looks fine during setup. I manually customize every color in the palette. But once I apply the theme, some UI elements (like toggles, highlights, or buttons) show up in green—even though I never selected green anywhere in my palette.

When I go to Wallpapers and Style > Color Palette, I notice that my custom palette includes an extra green swatch at the bottom. It seems like One UI 7 is injecting a sixth color into the palette that Theme Park doesn’t let me customize. This green tone appears to be Samsung’s default fallback when a color slot isn’t defined.

Interestingly, if I use the Color Palette feature directly from Wallpapers and Style (without Theme Park), the colors apply correctly and no green shows up.

Here’s what I’ve tried:

- Rebuilding the theme from scratch in Theme Park

- Manually customizing every visible color slot

Still, the green persists.

Is this a known limitation with Theme Park on One UI 7? Is there a workaround to override or remove that sixth color slot? Would love to hear if others are seeing the same thing—or if Samsung is planning a fix in future updates.

Thanks in advance!

[VerbumVeritum · Accepted solution]

I'm fairly confident this is the same problem I had been experiencing with the red being unchangeable. The only time the green shows up for me is when using the wallpaper you posted in your screenshot. For some reason, the system is auto-selecting a complementary or contrasting color based on the wallpapers and applying it to the color palette in Wallpapers and style. I've been reporting this for almost 2 years now, it's very annoying. The only way I have been able to alter it is by using a different wallpaper.

[Bastet999]

Well, I think you are right.

I went to try a golden wallpaper (all my previous have some purple in them and apparently that = green) and my stuck green became blue.

It's really annoying, but nobody seems to notice. At this point I was just hoping to find a "Yes, it's a bug we are aware of," but there is nothing.

[Dcchillin46]

ya about a month later and my tab S8+ is doing the same thing. set up my entire theme in theme  park, then when i apply it. it automatically enables color pallet in settings and applies an ugly brown color based on my background. my Calander widget turns poo brown thanks to this, and if I remove the theme from settings it removes my theme park theme entirely.

super frustrating.