Updated Color scheme (markdown)

Color-schemes.md

@@ -1,10 +1,22 @@
 You can partially or completely customize the default color configuration of fzf with `--color` option. 
 
-```
+```sh
+# --color=[BASE_SCHEME][,COLOR:ANSI]
 fzf --color=bg+:24
 fzf --color=light,fg:232,bg:255,bg+:116,info:27
 ```
 
+The color specification can be quite long if fully customized, so it's advised that you put it in `$FZF_DEFAULT_OPTS`. You can split it into multiple occurrences of `--color`.
+
+```sh
+export FZF_DEFAULT_OPTS='
+  --extended
+  --bind ctrl-f:page-down,ctrl-b:page-up
+  --color fg:124,bg:16,hl:202,fg+:214,bg+:52,hl+:231
+  --color info:52,prompt:196,spinner:208,pointer:196,marker:208
+'
+```
+
 ##### Base scheme
 
 (default: dark on 256-color terminal, otherwise 16)
@@ -14,7 +26,7 @@ fzf --color=light,fg:232,bg:255,bg+:116,info:27
 - `16`      Color scheme for 16-color terminal
 - `bw`      No colors
 
-#### Color configuration
+##### Color configuration
 - `fg`      Text
 - `bg`      Background
 - `hl`      Highlighted substrings
@@ -27,5 +39,4 @@ fzf --color=light,fg:232,bg:255,bg+:116,info:27
 - `marker`  Multi-select marker
 - `spinner` Streaming input indicator
 
-## Red