orx-palette

Collections of color palettes and tools for interacting with them.

Find demos in the demo folder.

ColorBrewer2

A collection of color palettes based on the research of Dr. Cynthia Brewer. Explore them live at colorbrewer2.org.

Each Palette has between 3 and 11 colors.

Use colorBrewer2Palettes() to query and obtain a list of ColorBrewer2Palette instances.

// all palettes
val palettes = colorBrewer2Palettes()

// palettes with 5 colors
val palettes = colorBrewer2Palettes(numberOfColors = 5)

// palettes of type Sequential 
val palettes = colorBrewer2Palettes(palettetype = ColorBrewer2Type.Sequential)

Once we have some palettes, we can pick one and use its colors:

palettes.first().colors.forEachIndexed { i, color ->
    drawer.fill = color
    drawer.circle(drawer.bounds.center, 300.0 - i * 40.0)
}

Palette Studio

A class to load palette collections from JSON files, load random palettes and sort colors. JVM only.

Usage

val paletteStudio = PaletteStudio(
    loadDefault = true, // Loads the first collection of palettes. [default -> true]
    sortBy = PaletteStudio.SortBy.DARKEST, // Sorts the colors by luminance. [default -> PaletteStudio.SortBy.NO_SORTING]
    collection = PaletteStudio.Collections.TWO, // Chooses which collection to load [default -> Collections.ONE]
    colorCountConstraint = 3 // Constraints the number of colors in the palette [default -> 0]
)

// The choice of the background and foreground colors is based on contrast ratios
drawer.background(paletteStudio.background)
drawer.stroke = paletteStudio.foreground

val randomPaletteColor = Random.pick(paletteStudio.colors!!)
val randomColorExcludingBackground = Random.pick(paletteStudio.colors2!!)

// grabs a random palette from the collection
paletteStudio.randomPalette()

// randomizes the order of the colors in the palette
paletteStudio.randomize()

// changes the collection of palettes
paletteStudio.loadCollection(PaletteStudio.Collections.TWO)

// load your own from a JSON file with a structure of Array<Array<String>>
paletteStudio.loadExternal("data/palette-autumn.json")

Keybindings

Keybindings for getting a random palette (l) and randomizing (k) one can be set easily by declaring inside the program:

val paletteStudio = PaletteStudio()

extend(paletteStudio)

Demos

DemoColorBrewer2_01

Demonstrates how to use a ColorBrewer2 palette. Finds the first available palette with 5 colors, then draws concentric circles filled with those colors.

source code

DemoColorBrewer2_02

Visualizes the ColorBrewer2 color palettes with 8 colors as circles made of colored arcs.

source code

DemoColorBrewer2_03

Visualizes 49 ColorBrewer2 color palettes of type "Diverging" as circles made of colored arcs. Since there are more palettes than grid cells, not all palettes are visualized.