Inlay Hints coloring doesn't accept alpha values defined under "hint:" by themes

[tecandrew]

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Describe the bug / provide steps to reproduce it

while debugging a theme I found that settings.json > inlay_hints coloring doesn't accept alpha values, or mixes it?, that are defined by a theme using hint: .... this parameter affects the git blame coloring and other stuff, which does accept the opacity alpha values stuff. See photo

(input template)

{
...
    "hint": "#{{ c.red | mod(opacity=0.3) | get(key="hex") }}",
    "hint.border": "#{{ c.red | mod(opacity=0.3) | get(key="hex") }}",
    "hint.background": "#{{ c.mantle.hex }}",
...
}

(output json for themes/theme.json)

{
...
  "hint": "#d20f394d",
  "hint.border": "#d20f394d",
  "hint.background": "#e6e9ef",
...
}

the : void and : Provise<void> are the inlay hints from a javascript file. you can see it's not the same color as the "winston" git blame coloring, but it's a shade of red that I defined for testing

Environment

Zed: v0.132.5 (Zed)
OS: macOS 14.4.1
Memory: 16 GiB
Architecture: aarch64

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