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The Debugging menu is menu option 6. It displays a 4×4 grid of ANSI terminal background color blocks to confirm that your terminal emulator correctly renders the full 16-color ANSI palette. No files are written and no system commands are executed — the output is purely a visual test of your terminal’s color support.

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Color Swatches

The grid is rendered using ANSI background escape codes. Each cell is two spaces wide, producing a colored rectangle. The 16 swatches are arranged in four rows:
RowColorANSI Code
1Red41
1Green42
1Yellow43
1Blue44
2Magenta45
2Cyan46
2White47
2Bright Black / Dark Gray100
3Bright Red101
3Bright Green102
3Bright Yellow103
3Bright Blue104
4Bright Magenta105
4Bright Cyan106
4Bright White107
4Black40
The raw escape sequence rendered by LRhub is: 
print("\27[41m  \27[42m  \27[43m  \27[44m  \n\27[45m  \27[46m  \27[47m  \27[100m  \n\27[101m  \27[102m  \27[103m  \27[104m  \n\27[105m  \27[106m  \27[107m  \27[40m  \27[0m")
After the color grid is displayed, the tool prompts: 
───────────────────────────
Go back or exit? [y/n]

>
  • Enter y to return to the main LRhub menu.
  • Enter n to exit LRhub entirely.
If colors don’t display correctly, ensure your terminal supports 256-color or ANSI escape codes. Most modern terminals — GNOME Terminal, Alacritty, kitty, and tmux — do. If you see raw escape characters instead of colored blocks, check that your TERM environment variable is set to a value such as xterm-256color.
This menu is intended for development and verification of the hub’s ANSI output. It does not test 256-color (8-bit) or true-color (24-bit) modes — only the standard 16-color ANSI background palette.

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