Requires the library mod Hybrid.

Welcome Message is a mod (a Hytale Java plugin) that can be useful in servers where you want to announce a message to players. Any player joining will receive up to 4 messages. Each can be configured with a specific RGB colour.

To send less messages, just leave the text empty in the config.

Configurable: ( how do I configure? )
welcomeMessageLine1 (default = "Welcome, %username%!")
welcomeMessageRGBLine1 (default = "255,170,0")
welcomeMessageLine2 (default = "")
welcomeMessageRGBLine2 (default = "0,0,0")
welcomeMessageLine3 (default = "")
welcomeMessageRGBLine2 (default = "0,0,0")
welcomeMessageLine4 (default = "")
welcomeMessageRGBLine2 (default = "0,0,0")

Showcase:
Every time a player joins the server, they'll be sent up to four configurable messages:

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You may freely use this mod in any mod collection, as long as the download remains hosted within the CurseForge ecosystem.

Serilum.com contains an overview and more information on all mods available.

Comments are disabled as I'm unable to keep track of all the separate pages on each mod.
For issues, ideas, suggestions or anything else there is the Github repo. Thanks!