Make index text box green when item found

[tacit coral]

when i collect an item on my game, i want it's textbox in the index to turn green. no codes have been working, can anyone help? i can show codes that haven't work, need help asap

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local event = ReplicatedStorage:WaitForChild("CelebFoundEvent")

local player = game.Players.LocalPlayer
local frame = script.Parent:WaitForChild("Frame")

-- When player joins, check FoundCelebs to pre-fill GUI
local function updateIndex()
local foundCelebs = player:WaitForChild("FoundCelebs")
for _, celebFlag in ipairs(foundCelebs:GetChildren()) do
local label = frame:FindFirstChild(celebFlag.Name)
if label and label:IsA("TextLabel") then
label.TextColor3 = Color3.fromRGB(0, 255, 0)
end
end

-- Watch for any new finds added later
foundCelebs.ChildAdded:Connect(function(child)
    local label = frame:FindFirstChild(child.Name)
    if label and label:IsA("TextLabel") then
        label.TextColor3 = Color3.fromRGB(0, 255, 0)
    end
end)

end

updateIndex()

-- Update immediately when event fires
event.OnClientEvent:Connect(function(celebName)
local label = frame:FindFirstChild(celebName)
if label and label:IsA("TextLabel") then
label.TextColor3 = Color3.fromRGB(0, 255, 0)
end
end)print("Hello world!")