Imports System
Public Class Program
Public Shared Sub Main()
Dim r As Integer = 80
Dim g As Integer = 125
Dim b As Integer = 210
Dim hex As String = String.Format("#{0:X2}{1:X2}{2:X2}", r, g, b)
Console.Write(hex)
End Sub
End Class
' run:
'
' #507DD2
'