ferrum.schemes¶

Color scheme utilities.

Color scheme lookups — continuous_palette and the Gradient factory.

continuous_palette ¶

continuous_palette(name: str)

Look up a built-in continuous colormap by name.

Parameters:

Name	Type	Description	Default
`name`	`('viridis', 'plasma', 'magma', 'inferno', 'cividis')`	Built-in colormap name.	`"viridis"`

Returns:

Type	Description
`ContinuousScheme`	A ferrum continuous scheme suitable for `Color(scale=...)`.

Raises:

Type	Description
`ValueError`	If `name` is not one of the built-in colormaps.

Examples:

>>> import ferrum as fm
>>> scheme = fm.continuous_palette("viridis")
>>> fm.Chart(df).encode(x="x", y="y", color=fm.Color("val", scale=scheme))