add faq about changing colors

README.md

@@ -41,6 +41,7 @@ it will generate the same prompt.
    1. [What do different symbols in Git status mean?](#what-do-different-symbols-in-git-status-mean)
    1. [How do I change the format of Git status?](#how-do-i-change-the-format-of-git-status)
    1. [How do I add username and/or hostname to prompt?](#how-do-i-add-username-andor-hostname-to-prompt)
+   1. [How do I change colors?](#how-do-i-change-colors)
    1. [Why does Powerlevel10k spawn extra processes?](#why-does-powerlevel10k-spawn-extra-processes)
    1. [Are there configuration options that make Powerlevel10k slow?](#are-there-configuration-options-that-make-powerlevel10k-slow)
    1. [Is Powerlevel10k fast to load?](#is-powerlevel10k-fast-to-load)
@@ -484,6 +485,19 @@ adjusting the values of parameters nearby. There are plenty of comments to help
 Finally, you can move `context` segment to where you want it to be in your prompt. Perhaps somewhere
 within `POWERLEVEL9K_LEFT_PROMPT_ELEMENTS`.
 
+### How do I change colors?
+
+Open `~/.p10k.zsh`, search for "color", "foreground" and "background" and change values of
+appropriate parameters. Colors are specified using numbers from 0 to 255. Colors from 0 to 15 look
+differently in different terminals. Many terminals also support customization of these colors
+through color schemes or themes. Colors from 16 to 255 always look the same.
+
+To see how different colors look in your terminal, run the following command:
+
+```zsh
+for i in {0..255}; do print -Pn "%${i}F${(l:3::0:)i}%f " ${${(M)$((i%8)):#7}:+$'\n'}; done
+```
+
 ### Why does Powerlevel10k spawn extra processes?
 
 Powerlevel10k uses [gitstatus](https://github.com/romkatv/gitstatus) as the backend behind `vcs`