There is no universal Hytale color code
The correct output depends on where the text will be used and which API, library, or server mod will parse it. A Java Message object, a TaleMessage tag, an EliteEssentials chat message, and a LuckPerms command are different targets even when the preview looks similar.
Always select the exact integration installed on your server. HyTools changes the output, file type, supported styles, and setup notes to match the selected adapter.
Test compatibility in small steps
Start with a short plain color test before pasting a long gradient. If the raw codes appear in chat, the formatter is not active for that context, the required permission is missing, or another chat system is handling the message.
Review the integration documentation after updates. Formatting capabilities can change by version, and symbols or styles accepted in one context may fail in another.