Put message in cell depending of characters in another cell

[tmpollard]

Hello all, I need help with a formula that will put a certain message in a cell depending on the first 4 digits of what is in another cell.
Example, cell A1 has 636755747857 the first 4 digits are 6367 so put "Blue" in cell B1.

There are about 20 combinations of the first 4 digits that will be unique so this is a shortened list. Thank You..

636755747857 Blue
636287561396 Yellow
636869685747 Green
636755747873 Blue
636287561324 Yellow
636869685740 Green
636755747865 Blue
636287561432 Yellow
636869685754 Green
636755747881 Blue
636287561360 Yellow
636869685733 Green

 

[gaz_chops]

Create a small table with the 4 digit codes and the colours, like (i put it in E1:F20)

[TABLE="width: 130"]
<!--StartFragment--> <colgroup><col width="65" span="2" style="width:65pt"> </colgroup><tbody>[TR]
  [TD="width: 65, align: right"]6367[/TD]
  [TD="width: 65"]Blue[/TD]
 [/TR]
 [TR]
  [TD="align: right"]6362[/TD]
  [TD]Yellow[/TD]
 [/TR]
 [TR]
  [TD="align: right"]6368[/TD]
  [TD]Green[/TD]
 [/TR]
<!--EndFragment--></tbody>[/TABLE]

Then use formula

=VLOOKUP(LEFT(A1,4)+0,$E$1:$F$20,2,FALSE)