Hello again, thanks for your kind message in #770.

Here's my PR. I tested it by

• running tests (added 3 new tests)
• building locally with go build -o gh-dash . and moving the binary to ~/.local/share/gh/extensions/gh-dash/ and then running gh dash, with the config file below.

In a nutshell, this PR replaces the hexcolor validator with a custom color validator that accepts both hex and ansi (0-255) formats. It's a strictly additive change — all previously valid configs remain valid.

Config file and screenshot:

Details

`~/.config/gh-dash/config.yml`

theme:
  ui:
    sectionsShowCount: true
    table:
      showSeparators: true
      compact: false
  colors:
    text:
      primary: '2' # green
      secondary: '6' # cyan
      inverted: '15' # base3 (brightwhite)
      faint: '8' # base03 (brightblack)
      warning: '1' # red
      success: '2' # green
      actor: '4' # blue
    background:
      selected: '7' # base2 (white)
    border:
      primary: '0' # black
      secondary: '5' # magenta
      faint: '14' # base1 (brightcyan)
    icon:
      newcontributor: '037'
      contributor: '133'
      collaborator: '136'
      member: '136'
      owner: '166'
      unknownrole: '125'
  icons:
    newcontributor: "\U000F0394"
    contributor: ''
    collaborator: ''
    member: ''
    owner: ''
    unknownrole: "\U000F0B59"

Changes

• Renamed the HexColor type to Color and swapped the built-in hexcolor tag for a custom color validator that accepts hex colors or numeric ANSI indices (0–255)
• Renamed the _shimHex helper in theme.go to _shimColor (pure rename, no logic change — lipgloss already handles both formats)
• Updated the documentation schemas to reflect the broader accepted format
• Added tests for valid and invalid inputs, including edge cases ("256", "-1", leading zeros, etc.)

Closes #770