Why does brush have only 3 hexa value?

Question

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?

`FF0000FF` is 8 digits long, not 6. – BoltClock Sep 27 '11 at 11:07 — BoltClock, Sep 27 '11 at 11:07
@BoltClock you're right.. it's an embarrassing mistake – Louis Rhys Sep 27 '11 at 12:47 — Louis Rhys, Sep 27 '11 at 12:47

score 8 · Accepted Answer · answered Sep 27 '11 at 11:02

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" />

I haven't tried it, but you should be able to use all these notations with any other XAML attribute that takes a `Color`. — BoltClock, Sep 27 '11 at 11:09

score 4 · Answer 2 · answered Sep 27 '11 at 11:03

4

If you use a 3 digit value, each digit is automatically doubled, so #AAA is equivalent to #AAAAAA and #123 = #112233

answered Sep 27 '11 at 11:03

Julian

2,021
16
21

score 0 · Answer 3 · answered Sep 27 '11 at 11:10

0

Your example FF0000FF represents 4 Hex (tuple) values which represent 4 Bytes (RGBA). The term #AAA is a shortvalue term. #AAA equals #AAAAAA equals #FFAAAA

answered Sep 27 '11 at 11:10

jami

190
2
14

Why does brush have only 3 hexa value?

3 Answers3