Types
Every property and every expression has a type: color, length, or
brush.[sls.type.kinds]
A color is a color with red, green, blue, and alpha channels.
The default color is transparent.[sls.type.color]
length
Section titled “length”A length is a distance.
The default length is zero.[sls.type.length]
A brush defines the content that an element is filled with.
The default brush is transparent.[sls.type.brush]
Conversions
Section titled “Conversions”An expression whose type isn’t the type of the property only binds to it if one of the conversions in this section applies.[sls.type.conversions]
A color converts to a brush:
the brush that fills with that single color.[sls.type.convert.color-to-brush]
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