tesk9/palette 1.1.0

Work with Colors in Elm.

This package makes working with RGB, HSL, and Hex colors easy, convenient, and safe. Easily convert from one color system to another, blend and transform colors, and generate beautiful palettes programmatically. Use named colors from common web color palettes, like X11.

Currently, palette does not provide first-class alpha channel support (transparency).

Long term, I'm interested in exploring generating accessible palettes and validating the accessibility of existing palettes. Check out the Color.Contrast for more on accessibility.

Issues, bugs, and enhancement suggestions very welcome on the github repo.

Getting started

You can view named colors in the Palette namespace, but sometimes you'll want to make your own custom or user defined colors.

The library currently supports creating Colors from RGB values, HSL values, and hex values.

import Color exposing (Color)


myOrangeyRed : Color
myOrangeyRed =
    Color.fromRGB ( 255, 80, 0 )


myTurquoiseIsh : Color
myTurquoiseIsh =
    Color.fromHSL (127, 50, 50)


myHex : Result String Color
myHex =
    Color.fromHexString "#ff9800"

Generating a palette

Suppose you want to use a three-color palette, and you know you want one of the colors to be red. Maybe you want the palette to be comprised of evenly-spaced colors on the color wheel.

import Color exposing (Color)
import Color.Generator
import Palette.X11 exposing (red)

myPalette : (Color, Color, Color)
myPalette =
    let
        (color2, color3) =
            triadic red
    in
    (red, color2, color3)

Or maybe we want a monochromatic color scheme -- the various tints and lightnesses available from a starting hue.

import Color exposing (Color)
import Color.Generator
import Palette.X11 exposing (red)


myPalette : List Color
myPalette =
    let
        stepSize =
            -- how many degrees of lightness apart each step should be
            10

    in
        Color.Generator.monochromatic stepSize red

Mixing colors together

If you've used Photoshop, you may be familiar with color blending with functions like multiply. If not, I recommend taking a lot at the examples & playing until you get a feel for what the functions do.

Working with contrast

Use Color.Contrast functions to verify that your font size, boldness, and color meet accessibility standards.

Developing & Contributing

Examples

cd examples
elm reactor
open http://localhost:8000/src/Main.elm

Running tests

I couldn't get the tests working on travis ci properly :( But there are tests!

npm install
npm test

tesk9/palette/1.1.0