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256-colour test pattern

To get the below image, use:

curl -s https://gist.githubusercontent.com/HaleTom/89ffe32783f89f403bba96bd7bcd1263/raw/ | bash

The gist bash/zsh code is shellcheck clean, and also supports "Look Ma, no subprocesses!".

Alternatively, for a bash quicky:

for i in {0..255} ; do
    printf "\x1b[48;5;%sm%3d\e[0m " "$i" "$i"
    if (( i == 15 )) || (( i > 15 )) && (( (i-15) % 6 == 0 )); then
        printf "\n";
    fi
done

For total overkill, the granddaddy of the lot is terminal-colors, a 572-line script with multiple output formats.

You can also print a true color (24-bit) test pattern.

256-colour test pattern

To get the below image, use:

curl -s https://gist.githubusercontent.com/HaleTom/89ffe32783f89f403bba96bd7bcd1263/raw/e50a28ec54188d2413518788de6c6367ffcea4f7/print256colours.sh | bash

The gist bash/zsh code is shellcheck clean, and also supports "Look Ma, no subprocesses!".

Alternatively, for a bash quicky:

for i in {0..255} ; do
    printf "\x1b[48;5;%sm%3d\e[0m " "$i" "$i"
    if (( i == 15 )) || (( i > 15 )) && (( (i-15) % 6 == 0 )); then
        printf "\n";
    fi
done

For total overkill, the granddaddy of the lot is terminal-colors, a 572-line script with multiple output formats.

You can also print a true color (24-bit) test pattern.

256-colour test pattern

To get the below image, use:

curl -s https://gist.githubusercontent.com/HaleTom/89ffe32783f89f403bba96bd7bcd1263/raw/ | bash

[![256-colour test pattern][1]][1]

The gist bash/zsh code is shellcheck clean, and also supports "Look Ma, no subprocesses!".

Alternatively, for a bash quicky:

for i in {0..255} ; do
    printf "\x1b[48;5;%sm%3d\e[0m " "$i" "$i"
    if (( i == 15 )) || (( i > 15 )) && (( (i-15) % 6 == 0 )); then
        printf "\n";
    fi
done

For total overkill, the granddaddy of the lot is terminal-colors, a 572-line script with multiple output formats.

You can also print a true color (24-bit) test pattern. [1]: https://i.sstatic.net/L6yhm.png

256-colour test pattern

To get the below image, use:

curl -s https://gist.githubusercontent.com/HaleTom/89ffe32783f89f403bba96bd7bcd1263/raw/ | bash

The gist bash/zsh code is shellcheck clean, and also supports "Look Ma, no subprocesses!".

Alternatively, for a bash quicky:

for i in {0..255} ; do
    printf "\x1b[48;5;%sm%3d\e[0m " "$i" "$i"
    if (( i == 15 )) || (( i > 15 )) && (( (i-15) % 6 == 0 )); then
        printf "\n";
    fi
done

For total overkill, the granddaddy of the lot is terminal-colors, a 572-line script with multiple output formats.

You can also print a true color (24-bit) test pattern.

256-colour test pattern

[![256-colour test pattern][1]][1]

For the above, you can use my gist bash/zsh code which is shellcheck clean, and also supports "Look Ma, no subprocesses!"

Or for a bash quicky:

for i in {0..255} ; do
    printf "\x1b[48;5;%sm%3d\e[0m " "$i" "$i"
    if (( i == 15 )) || (( i > 15 )) && (( (i-15) % 6 == 0 )); then
        printf "\n";
    fi
done

For total overkill, the granddaddy of the lot is terminal-colors, a 572-line script with multiple output formats.

You can also print a true color (24-bit) test pattern. [1]: https://i.sstatic.net/L6yhm.png

256-colour test pattern

To get the below image, use:

curl -s https://gist.githubusercontent.com/HaleTom/89ffe32783f89f403bba96bd7bcd1263/raw/ | bash

[![256-colour test pattern][1]][1]

The gist bash/zsh code is shellcheck clean, and also supports "Look Ma, no subprocesses!".

Alternatively, for a bash quicky:

for i in {0..255} ; do
    printf "\x1b[48;5;%sm%3d\e[0m " "$i" "$i"
    if (( i == 15 )) || (( i > 15 )) && (( (i-15) % 6 == 0 )); then
        printf "\n";
    fi
done

For total overkill, the granddaddy of the lot is terminal-colors, a 572-line script with multiple output formats.

You can also print a true color (24-bit) test pattern. [1]: https://i.sstatic.net/L6yhm.png