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Rainbow Color Palette

 

Description

Examples

Description

• 

The Rainbow color palette is a cyclic colormap across a rainbow of hues, with an isoluminant color gradient, it can be used for data where variations in lightness may create false artifacts. It was developed for the Colorcet package, and used via a CC-BY license.

Examples

> 

with⁡ColorTools:

The palette contains 256 colors across the rainbow spectrum.

> 

DisplayPalette⁡Rainbow

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You can reference colors in the palette by number in most commands that understand color names.

> 

plot⁡x,x3,x=−1..1,color=Rainbow 10,Rainbow 200

> 

C≔Color⁡Rainbow 21

C≔⟨RGB : 0.0235 0.0118 0.655⟩

(1)

You can programmatically access the colors using ColorTools commands.

> 

P≔GetPalette⁡Rainbow:

> 

P1

⟨RGB : 1⟩

(2)
> 

Swatches⁡P

The Rainbow colormap is provided to give a rainbow effect with uniform color and lightness difference, the hue differences can lead to false features in data, so care should be taken when using it.

> 

ColorTools:-Swatches⁡P,mode=gradient

This colormap isn't quite centered when converted to grayscale.

> 

ColorTools:-Swatches⁡P,mode=gradient,`=`⁡filter,c↦Color⁡Gs,c

This colormap is not really suitable users with CVD.

> 

ColorTools:-Swatches⁡P,mode=gradient,filter=CVDSimulation

The Blend command can be used to create a function to color arbitrary ranges. It can take the name of a palette to generate a colormap.

> 

ColorMap≔ColorTools:-Blend⁡Rainbow:

> 

ColorMap⁡0.35

⟨RGB : 0.145 0.56 0.472⟩

(3)

And is particularly good when used to color surfaces. The colorscheme option of plots can take the names of palettes to generate gradients.

> 

plot3d⁡sin⁡x⁢cos⁡y,x=−32⁢π..32⁢π,y=−32⁢π..32⁢π,colorscheme=Rainbow

See Also

ColorTools[DisplayPalette]

ColorTools[Palette]

plots[setcolors]