Change Color a Textboxes from the Lower of the Highest - vb.net

Question

I have 2 codes to change the color to Textbox, and unfortunately none of them work. What's wrong here? Why the code is not good. Every time I try the code, it tells me there are no variables. The first code changes the color to Textbox if there is a value between 1 and 7, and the second changes the value in ascending order from the lowest to the highest and assigns a corresponding color.
Images: http://www.imagebam.com/image/5ac5ee1073004874
http://www.imagebam.com/image/92a4091073004904
Code 1:
Public Class TextBoxColors
Private ColorTable As Dictionary(Of String, Color) = New Dictionary(Of String, Color)()
Public Sub New()
ColorTable.Add("1", Color.Red)
ColorTable.Add("2", Color.Aqua)
ColorTable.Add("3", Color.Chocolate)
ColorTable.Add("4", Color.BlanchedAlmond)
ColorTable.Add("5", Color.BurlyWood)
ColorTable.Add("6", Color.BlueViolet)
ColorTable.Add("7", Color.DarkBlue)
End Sub
Public Function GetColor(ColorMap As String) As Color
Return If(ColorTable.Keys.Contains(ColorMap), ColorTable(ColorMap), Color.White)
End Function
End Class
Private txtColor As TextBoxColors = New TextBoxColors()
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
For Each txtDraw As TextBox In Me.Controls.OfType(Of TextBox).Where(Function(txt) txt.Name.StartsWith("txtDraw"))
AddHandler txtDraw.TextChanged,
Sub()
If Not String.IsNullOrEmpty(txtDraw.Text) Then
txtDraw.BackColor = txtColor.GetColor(txtDraw.Text)
End If
End Sub
Next
End Sub
Code 2: This 2nd code must be changed based on my text box, which starts with SumtxtDraw
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
FillColorList()
End Sub
Private Sub ColorTextBoxes()
FillTextBoxList(16, 23)
Dim SortedList As List(Of TextBox) = SortList()
Dim index As Integer
For Each txt As TextBox In SortedList
txt.BackColor = lstColor(index)
index += 1
Next
End Sub
Private Sub FillColorList()
lstColor.Add(Color.Red) 'for lowest number
lstColor.Add(Color.BlanchedAlmond)
lstColor.Add(Color.PaleGreen)
lstColor.Add(Color.Chartreuse)
lstColor.Add(Color.CadetBlue)
lstColor.Add(Color.Orange)
lstColor.Add(Color.DarkMagenta)
lstColor.Add(Color.Violet) 'for highest number
End Sub
Private Sub FillTextBoxList(StartNumber As Integer, EndNumber As Integer)
lstTextBox.Clear()
For suffix = StartNumber To EndNumber
lstTextBox.Add(DirectCast(Controls("TextBox" & suffix.ToString), TextBox))
Next
End Sub
Private Function SortList() As List(Of TextBox)
Dim orderedList = From txt In lstTextBox Order By CInt(txt.Text) Descending Select txt '$"{scorer.Score} - {scorer.Name}"
Dim SortedList As List(Of TextBox) = orderedList.ToList
Return SortedList
End Function
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
ColorTextBoxes()
End Sub