Can roblox be connected to outside sources?

mhm it can. I made a simple implementation, it works the way that I have a text file on my server (think of server as a computer that's 24/7 online and you can save files there and then download them from anywhere, these files can be websites too). This text file's contents can be changed using a website, then I have a Roblox script which every 0.5 seconds sets color of baseplate to the color written in the text file.

This is the website where you can change the color: http://kirda.wtf/1blaisinraisin08/change.php

This is the Roblox place: https://www.roblox.com/games/10021943758/Powerful-Baseplate

This is the Roblox script:

local HttpService = game:GetService("HttpService")
local Workspace = game:GetService("Workspace")

local url: string = "http://kirda.wtf/1blaisinraisin08/color.txt"

while task.wait(0.5) do
    -- ignore the pcall thing it is lazy way to prevent the script from stopping in
    -- case any error happens
    pcall(function()
        Workspace.Baseplate.Color = Color3.fromHex( HttpService:GetAsync(url) )
    end)
end

Color3.fromHex converts hex color into color compatible with Roblox color system. Websites stick to hex color.

The website was made using few lines of PHP code.