====== BASH - Colors - 8-bit Colors ======

256 colors.

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===== Format =====

<code bash>
ESC[ 38;5;⟨n⟩ m Select foreground color
ESC[ 48;5;⟨n⟩ m Select background color
</code>

where n is:

<code bash>
  0-  7:  standard colors (as in ESC [ 30–37 m)
  8- 15:  high intensity colors (as in ESC [ 90–97 m)
 16-231:  6 × 6 × 6 cube (216 colors): 16 + 36 × r + 6 × g + b (0 ≤ r, g, b ≤ 5)
232-255:  grayscale from black to white in 24 steps
</code>

where:

  * **0** is BLACK.
  * **1** is RED.
  * **2** is GREEN.
  * **3** is YELLOW.
  * **4** is BLUE. 
  * **5** is MAGENTA. 
  * **6** is CYAN. 
  * **7** is WHITE. 

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===== RED Example =====

<code bash>
echo -e "\033[38;5;1mThis is in RED"
</code>

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===== BRIGHT RED Example =====

<code bash>
echo -e "\033[38;5;9mThis is in BRIGHT RED"
</code>

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===== ANSI Rainbow =====

<code bash>
for (( i = 0; i < 16; i++ )); do echo -e "\033[38;5;"$i"mHello"; done
</code>

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