Specifying Font Color in a Formula

Gregory has a desire to specify font color in a cell based on a formula. For instance, a cell might contain a simple IF function, such as =IF(A1>A2,5,7). If the "5" is returned, he would like the font to be normal, but if the "7" is returned, he would like it red. And, it must be noted, Gregory doesn't want to use a conditional formatting rule.

Short of using a macro (as described shortly) there is no way to specify font color in a formula. The easiest way to do this—well, the easiest way that doesn't use conditional formatting—is to create a custom format for the cell containing the formula. The format itself is quite simple:

[red][=7]General;General

The first part of the custom format (before the semicolon) indicates how positive numbers should be formatted. The portion after the semicolon indicates how negative numbers should be formatted. (The second, negative portion is included because if it is not, then Excel applies the singular format to every value that may appear in the cell, whether it be positive or negative.)

The first portion, for positive values, indicates that if the value in the cell is "7", then the value is shown in red. If it is any other positive value (including "5"), then it is shown in a regular font. If you want additional information about how to create custom formats, you can find a great tutorial at Mynda Treacy's site:

https://www.myonlinetraininghub.com/excel-custom-number-format-guide

The drawback to using custom formats in this way, of course, is that it is actually keyed to the value "7". If you want something a bit more generalized such that if any result where A1 is less than or equal to A2 results in the cell being red, then you might be interested in a macro-based approach. The following example is implemented as a user-defined function:

Function TColor(n1 As Double, n2 As Double) As Boolean
    If n1 <= n2 Then
        Application.Caller.Font.ColorIndex = 3
    Else
        ' Set font to normal
        Application.Caller.Font.ColorIndex = xlAutomatic
    End If
End Function

In order to use the UDF, just add it to your formula, in the following manner:

=IF(A1>A2,5,7)+TColor(A1,A2)

The UDF compares A1 to A2 and, if A1 is larger, then the text color is set to normal. If it is less than or equal to A2, then the text color is set to red.

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