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Editorial Team
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Asked: 2026-05-25T19:02:34+00:00

For example, in this page there is code such as: <SolidColorBrush x:Key=DisabledBorderBrush Color=#AAA />

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For example, in this page there is code such as:

<SolidColorBrush x:Key="DisabledBorderBrush" Color="#AAA" />

Why does the color property only have 3 hex value? Doesn’t color normally have 6 or 8 hex value? (like Fill=”#FF0000FF”) What does the 3 hexes means? mean?

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1 Answer

  1. Editorial Team

    Brush colors may be specified in hex notation with three, four, six or eight digits as shown in the MSDN page for SolidColorBrush:

    <object property="#rgb"/>
- or -
<object property="#argb"/>
- or -
<object property="#rrggbb"/>
- or -
<object property="#aarrggbb"/>

    #rgb expands to #rrggbb (like it does in CSS hex notation), and #argb expands to #aarrggbb. Using three or six digits, the alpha is always maxed out. That is, these are all equivalent:

    <SolidColorBrush x:Key="DisabledBorderBrush" Color="#AAA" />
<SolidColorBrush x:Key="DisabledBorderBrush" Color="#FAAA" />
<SolidColorBrush x:Key="DisabledBorderBrush" Color="#AAAAAA" />
<SolidColorBrush x:Key="DisabledBorderBrush" Color="#FFAAAAAA" />
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