Cyan¶

Status: Experimental

present and registered, but lightly documented and not yet covered by dedicated tests.

Description¶

Cyan

The named colour RGBColor[0, 1, 1].

Examples (3)¶

Every input below was run against the current Mathilda build and its output recorded.

Applications (3)¶

The named secondary evaluates straight to its RGBColor literal

In[1]:= Cyan
Out[1]= RGBColor[0, 1, 1]

An OwnValue, not an inert head -- already resolved

In[2]:= FullForm[Cyan]
Out[2]= RGBColor[0, 1, 1]

Usable wherever a directive is expected

In[3]:= Head[Graphics[{Cyan, Disk[]}]]
Out[3]= Graphics

Implementation notes¶

Definition. Cyan is one of Mathilda's named colour constants, bound as an OwnValue: register_color("Cyan", rgb_color(0, 1, 1)) in graphics_init (src/graphics/graphics_init.c) makes the bare symbol Cyan evaluate to the literal RGBColor[0, 1, 1] and marks it Protected. The docstring is kept centrally in src/info.c, beside CMYKColor.

Representation. Cyan evaluates to RGBColor[0, 1, 1], so FullForm[Cyan] is RGBColor[0, 1, 1] and Head[Cyan] is RGBColor. The color_component helper prints the exact 0/1 components as integers. Cyan, Magenta (RGBColor[1, 0, 1]) and Yellow (RGBColor[1, 1, 0]) are the secondary (subtractive) primaries — the same colour a CMYKColor single-ink directive converts to.

Usage & limits. As a resolved colour literal it is accepted anywhere a directive is — Graphics[{Cyan, Disk[]}], PlotStyle -> Cyan, Directive[Cyan, Thick]. Plot evaluates its option values once before storing them, so Epilog -> Cyan also sees RGBColor[0, 1, 1]. It carries no opacity; use Opacity[a] or the four-argument RGBColor for translucency.

Attributes: Protected.

References¶

Source: src/graphics/graphics_init.c
Specification index: Mathilda_spec.md

Notes & additional examples¶

Notes¶

Cyan is the named colour RGBColor[0, 1, 1]. It is bound as a Protected OwnValue, so it resolves to a real colour literal wherever a bare argument is evaluated: FullForm[Cyan] is RGBColor[0, 1, 1] and Head[Cyan] is RGBColor.

Cyan, Magenta (RGBColor[1, 0, 1]) and Yellow (RGBColor[1, 1, 0]) are the secondary (subtractive) primaries — the colours a single-ink CMYKColor directive maps to. The exact-0/1 components print as integers. Cyan carries no opacity; use Opacity[a] or the four-argument RGBColor[r, g, b, a].