Can't create Tab groups with drag-and-drop, and their inconsistent colors

Description of the issue:
I use Edge at work, and often use the tab groups to organize my browser and reduce clutter, by folding groups. Recently, I have started opening more tabs on my private computer, and would like to try the same or similar functionality in Brave.
Unfortunately, dragging one tab on top of another, does not group them, and when I use the right-click context menu to create a group, the grouping is barely visible with only a slight tint.

How can this issue be reproduced?
1.Open two or more tabs.
2.Try to drag one on top of another.
3.Right click a tab and “Add tab to new Group”
4.Compare availiable colors with the one displayed in the window bar

Examples for all colors on my machine:


Expected result:
Tabs should group themselves before trying to swap places.
Groups colors should be consistent in the choice menu and their actual display.

Brave Version:
Version: 1.64.122
Chromium: 123.0.6312.122
(Official Build) (64-bit)

Additional Information:
I do not use names, because that way groups are thinner and I can use more of the space for the one group currently use.
I would like to ask for guidance, if this is expected behaviour and if it can be in anyway adjusted in settings I have not found, or in “brave://flags”