Attributes

Roblox has introduced a system called attributes, and I added attributes for each individual player for developers to configure. This is quite easy to do, and does not require a plugin.

Attribute Name	Type	Description
TextColor	Color3	Player's chat color
NameColor	Color3	Player's name color
DisplayNameColor	Color3	Player's display name color
ChatBubbleColor	Color3	Player's chat bubble color
ChatBubbleTextColor	Color3	Player's chat bubble text color
TypingIndicatorColor	Color3	Player's typing indicator "dot" color
Muted	boolean	Whether or not the specified user is muted

Examples

local player = game:GetService("Players").Player1
player:SetAttribute("Muted",true)

This would disable "Player1" from speaking in chat.

local player = game:GetService("Players").Player1
player:SetAttribute("TextColor",Color3.fromRGB(255,0,0))

This would make Player1's chat color Red.