tab.unfocusedBackground is applied even with the tab focused

[AdrianoCahete]

Windows Terminal version

1.24.2812.0 (preview)

Windows build number

10.0.26200.0

Other Software

No response

Steps to reproduce

Create a new theme like this:

{
      "name": "Dark+",
      "tab": {
        "background": "#71fc14",
        "iconStyle": "default",
        "showCloseButton": "never",
        "unfocusedBackground": "#1616165b"
      },
      "tabRow": {
        "background": "#313131b0",
        "unfocusedBackground": "#9797972f"
      },
      "window": {
        "applicationTheme": "dark",
        "experimental.rainbowFrame": false,
        "frame": null,
        "unfocusedFrame": null,
        "useMica": false
      }
    }
  ],

The colors visually:

Expected Behavior

That tabRow.background (active) use the color the way is defined, like this:

Actual Behavior

Actual behavior is that the tab.background receives the tab.unfocusedBackground color too.

The color is just fully used if unfocusedBackground has an alpha of 0% as: "unfocusedBackground": "#16161600"
Any changes in the alpha of unfocusedBackground, applies to focused tab color:

Focused full green / unfocused with alpha as 00 (0%):

"tab": {
        "background": "#71fc14",
        "unfocusedBackground": "#16161600"
      },

Focused is the same (green) / unfocused with alpha as FF (100%)

"tab": {
        "background": "#71fc14",
        "unfocusedBackground": "#161616FF"
      },

Focused is the same (green) / unfocused with alpha as FF (50%)

"tab": {
        "background": "#71fc14",
        "unfocusedBackground": "#16161680"
      },