'Graphics mode' ANSI escape codes on OpenWRT (Linux)

[max-dw-i]

When we execute some command on OpenWRT devices (that have the linux device type, basically), we can see ANSI escape codes that set the output colours. For example,

ls -s /
     0 \u001b[1;34mbin         0 \u001b[1;34mlib         0 \u001b[1;36mlib64       0 \u001b[1;34mmnt         1 \u001b[1;34moverlay     0 \u001b[1;34mproc        0 \u001b[1;34mrom         0 \u001b[1;34mroot        0 \u001b[1;34msbin        0 \u001b[1;34msys         0 \u001b[1;34mtmp         0 \u001b[1;34musr         0 \u001b[1;36mvar         0 \u001b[1;34mwww
root@OpenWrt:~#

There are already some regexes related to the output colours in the code. But I do not know how general the new regex should be. So far I've seen only the codes where the number after the ; changes (34, 36, etc.).