fix(colorscheme): default statusline groups usability #26921

Problem: Current values of `StatusLine` and `StatusLineNC` are currently
  designed to be visually distinctive while being not intrusive.
  However, the compromise was more shifted towards "not intrusive".
  After the feedback, statusline highlight groups should be designed to:
  - Make current window clearly noticeable. Meaning `StatusLine` and
    `StatusLineNC` should obviously differ.
  - Make non-current windows clearly separable. Meaning `StatusLineNC`
    and `Normal`/`NormalNC` should obviously differ.

Solution:
  - Update `StatusLineNC` to have more visible background.
  - Update `StatusLine` to be inverted variant of `StatusLineNC`.
  - Update `WinBar` and `WinBarNC` to not link to `StatusLine` and
    `StatusLineNC` because it makes two goals harder to achieve.
  - Update `TabLine` to link to `StatusLineNC` instead of `StatusLine`
    to not be very visually intrusive.

1 files changed, 1 insertions, 1 deletions

diff --git a/test/functional/ui/embed_spec.lua b/test/functional/ui/embed_spec.lua
index 9e08f7748e..e655ee1b54 100644
--- a/test/functional/ui/embed_spec.lua
+++ b/test/functional/ui/embed_spec.lua
@@ -26,7 +26,7 @@ local function test_embed(ext_linegrid)
       [3] = { bold = true, foreground = Screen.colors.Blue1 },
       [4] = { bold = true, foreground = Screen.colors.Green },
       [5] = { bold = true, reverse = true },
-      [6] = { foreground = Screen.colors.NvimDarkGrey3, background = Screen.colors.NvimLightGrey1 },
+      [6] = { foreground = Screen.colors.NvimLightGrey3, background = Screen.colors.NvimDarkGrey3 },
       [7] = { foreground = Screen.colors.NvimDarkRed },
       [8] = { foreground = Screen.colors.NvimDarkCyan },
     })