Converting any Color to their's corresponding Hexa-Decimal value using Asp.Net.

Write below code:-
Import System.Drawing Namespace at the top of .VB page

Imports System.Drawing

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load  
   Response.Write(ConvertColorCodeToHexColor(Color.Pink)+ "<br/>")  
   Response.Write(ConvertColorCodeToHexColor(Color.Blue)+ "<br/>")  
   Response.Write(ConvertColorCodeToHexColor(Color.Red)+ "<br/>")  
   Response.Write(ConvertColorCodeToHexColor(Color.Yellow)+ "<br/>")  
End Sub  
  
Function ConvertColorCodeToHexColor(ByVal clr As Color) As String  
    Return "#" + clr.ToArgb().ToString("x").Substring(2)  
End Function

Output:-
#ffc0cb
#0000ff
#ff0000
#ffff00

So,we can convert any Color into their Hex Value.