docs: add missing documentation about hex colors

Readme.md

@@ -89,6 +89,13 @@ channels:
 The use of [PlaceholderAPI][2] placeholders in the channel format is possible. For
 example `[<channel_name>]%vault_rank% %player_name%: <message>` will work and replace the placeholders.
 
+## Frequently Asked Questions
+
+### Are HEX colors supported?
+
+Yes they are. Use them just like the other colors, e.g. `<#ffffff><message>`. See this [formatting documentation][6] for
+more details.
+
 [1]: https://papermc.io/
 
 [2]: https://www.spigotmc.org/resources/vault.34315/
@@ -97,4 +104,6 @@ example `[<channel_name>]%vault_rank% %player_name%: <message>` will work and re
 
 [4]: https://www.spigotmc.org/resources/protocollib.1997/
 
-[5]: https://github.com/Silthus/sChat/releases
+[5]: https://github.com/Silthus/sChat/releases
+
+[6]: https://docs.adventure.kyori.net/minimessage#format

src/main/resources/config.default.yml

@@ -71,6 +71,7 @@ channels:
     # You can use the mini message format documented here: https://docs.adventure.kyori.net/minimessage#format
     # You can use the web viewer to preview how your chat will look: https://webui.adventure.kyori.net/
     # You can use any PlaceholderAPI placeholders with the {placeholder} syntax.
+    # You can use any hex color inside the <...> brackets, e.g. <#ffffff> instead of <yellow> or <green></green> <#ffffff></#ffffff>
     # The following custom mini message placeholders are available:
     # - <channel_name>: The name of the channel (see above).
     # - <sender_vault_prefix>: The Vault prefix of the sending player. Requires Vault to work. "Bleeding" color codes in prefix and suffix currently do not work.

src/main/resources/config.yml

@@ -71,6 +71,7 @@ channels:
     # You can use the mini message format documented here: https://docs.adventure.kyori.net/minimessage#format
     # You can use the web viewer to preview how your chat will look: https://webui.adventure.kyori.net/
     # You can use any PlaceholderAPI placeholders with the {placeholder} syntax.
+    # You can use any hex color inside the <...> brackets, e.g. <#ffffff> instead of <yellow> or <green></green> <#ffffff></#ffffff>
     # The following custom mini message placeholders are available:
     # - <channel_name>: The name of the channel (see above).
     # - <sender_vault_prefix>: The Vault prefix of the sending player. Requires Vault to work. "Bleeding" color codes in prefix and suffix currently do not work.