How to use an If statement only when not blank

[bobbybob]

I have a formula to fill text box when the user enters a specific number. I'm trying to figure out how to remove the fill color if there is no number entered?
If I use a formula like this: 

If(Value(Self.Text)>3, Red, Value(Self.Text)<1, Red, White)

it fills in the text box when there is no data entered yet. Is there a way to fix this? Thank you.

[RandyHayes · Accepted solution]

@bobbybob 

This is because the Value of blank is zero in this case, which is less than 1.

Quick fix is:

If(IsBlank(Self.Text), 'blankColorHere', 
    Value(Self.Text)>3, Red, 
    Value(Self.Text)<1, Red, 
    White
)

I hope this is helpful for you.

[bobbybob]

It worked, thank you!