The Color type class encompasses color representations which can be used by the Diagrams library. Instances are provided for both the Colour and AlphaColour types from the Data.Colour library.

An existential wrapper for instances of the Color class.

The color with which lines (strokes) are drawn. Note that child colors always override parent colors; that is, lineColor c1 . lineColor c2 $ d is equivalent to lineColor c2 $ d. More precisely, the semigroup structure on line color attributes is that of Last.

Set the line (stroke) color. This function is polymorphic in the color type (so it can be used with either Colour or AlphaColour), but this can sometimes create problems for type inference, so the lc and lcA variants are provided with more concrete types.

Apply a lineColor attribute.

A synonym for lineColor, specialized to Colour Double (i.e. opaque colors).

A synonym for lineColor, specialized to AlphaColour Double (i.e. colors with transparency).

The color with which shapes are filled. Note that child colors always override parent colors; that is, fillColor c1 . fillColor c2 $ d is equivalent to lineColor c2 $ d. More precisely, the semigroup structure on fill color attributes is that of Last.

Set a "recommended" fill color, to be used only if no explicit calls to fillColor (or fc, or fcA) are used.

Set the fill color. This function is polymorphic in the color type (so it can be used with either Colour or AlphaColour), but this can sometimes create problems for type inference, so the fc and fcA variants are provided with more concrete types.

A synonym for fillColor, specialized to Colour Double (i.e. opaque colors).

A synonym for fillColor, specialized to AlphaColour Double (i.e. colors with transparency).

Although the individual colors in a diagram can have transparency, the opacity/transparency of a diagram as a whole can be specified with the Opacity attribute. The opacity is a value between 1 (completely opaque, the default) and 0 (completely transparent). Opacity is multiplicative, that is, opacity o1 . opacity o2 === opacity (o1 * o2). In other words, for example, opacity 0.8 means "decrease this diagram's opacity to 80% of its previous opacity".

Multiply the opacity (see Opacity) by the given value. For example, opacity 0.8 means "decrease this diagram's opacity to 80% of its previous opacity".

Convert to sRGBA.

Convert to sRGBA.

The width of lines. By default, the line width is measured with respect to the final coordinate system of a rendered diagram, as opposed to the local coordinate systems in effect at the time the line width was set for various subdiagrams. This is so that it is easy to combine a variety of shapes (some created by scaling) and have them all drawn using a consistent line width. However, sometimes it is desirable for scaling to affect line width; the freeze operation is provided for this purpose. The line width of frozen diagrams is affected by transformations.

Line widths specified on child nodes always override line widths specified at parent nodes.

Set the line (stroke) width.

Apply a LineWidth attribute.

A convenient synonym for lineWidth.

What sort of shape should be placed at the endpoints of lines?

Set the line end cap attribute.

How should the join points between line segments be drawn?

Set the segment join style.

Miter limit attribute affecting the LineJoinMiter joins. For some backends this value may have additional effects.

Set the miter limit for joins with LineJoinMiter.

Apply a LineMiterLimit attribute.

Create lines that are dashing... er, dashed.

Set the line dashing style.

Push fill attributes down until they are at the root of subtrees containing only loops. This makes life much easier for backends, which typically have a semantics where fill attributes are applied to linesnon-closed paths as well as loopsclosed paths, whereas in the semantics of diagrams, fill attributes only apply to loops.