Celeb Glow
updates | March 16, 2026

Is it possible to add colors to Outlook's Categories color palette?

"Out of the box" it looks like there is a fixed palette of colors on Outlook when defining Categories. It seems odd that it when selecting a color it doesn't just allow you to selected any color.

Is there any way to selected different colors beyond the defined palette? Can it be done programmatically via an add-in?

2

2 Answers

I have had the same question and was looking up and down for an answer.

In short: The answer seems to be "no", Microsoft does not provide such functionality.

It is partially explained in this article; creating more seems not to be possible, as the colours are coded fix and identified by the numbers 1 - 25.

I see this answer is 3 years old--it is possible today. When you click on the color category (in edit category function), then select more colors, a color wheel comes up.

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