Added a sentence to colors.md clarifying that the truecolor environment variable has to be created by the user.
@@ -87,7 +87,8 @@ These may vary widely based on the 16 colors selected for your terminal.
True color requires your terminal to support it. This means that the
environment variable `COLORTERM` should have the value `truecolor`, `24bit`,
or `24-bit`. In addition, to enable true color in micro, the environment
-variable `MICRO_TRUECOLOR` must be set to 1.
+variable `MICRO_TRUECOLOR` must be set to 1. Note that you have to create
+and set this variable yourself.
* `solarized-tc`: this is the solarized colorscheme for true color.
* `atom-dark-tc`: this colorscheme is based off of Atom's "dark" colorscheme.
