How To Get Plotly Js Default Colors List

Are you looking to spice up your data visualizations using Plotly.js but not sure where to start with color schemes? Worry not! In this guide, we'll walk you through a simple method to get the default colors list in Plotly.js, making it easier for you to create stunning graphs and charts.

Plotly.js is a powerful JavaScript library for creating interactive data visualizations. One of the key aspects of any visualization is the choice of colors. Plotly.js provides a default color scheme that you can utilize to give your charts a professional and aesthetic look.

To access the default colors list in Plotly.js, you can follow these steps:

1. Import Plotly.js Library: Ensure that you have imported the Plotly.js library into your project. You can include the library in your HTML file using a script tag pointing to the Plotly.js CDN or by installing it via a package manager like npm.

2. Get Default Colors List: Plotly.js provides a function called `defaultPlotlyColors()` that returns an array of color strings representing the default colors used in Plotly.js charts.

Here's a simple JavaScript code snippet to retrieve the default colors list:

const defaultColors = Plotly.d3.scale.category10().range();
console.log(defaultColors);

In the code above, we use the `Plotly.d3.scale.category10().range()` function to get an array of ten default colors. You can adjust the number of colors by changing the parameter in the `category10()` function (e.g., `category20()` for twenty colors).

3. Utilize Default Colors: Once you have obtained the default colors list, you can use these colors in your Plotly.js charts by specifying the color attribute in the trace object of your chart. Here's an example of how to apply these default colors:

const data = [{
    x: [1, 2, 3, 4, 5],
    y: [1, 4, 9, 16, 25],
    type: 'scatter',
    mode: 'lines+markers',
    marker: {
        color: defaultColors[0] // Assigning the first default color
    }
}];

Plotly.newPlot('myChart', data);

In the code snippet above, we set the color attribute of the marker to `defaultColors[0]`, which corresponds to the first color in the default colors list.

By using the default colors provided by Plotly.js, you can enhance the visual appeal of your charts and make them more engaging for your audience. Experiment with different color combinations and find the ones that best suit your data visualization needs.

In conclusion, obtaining the default colors list in Plotly.js is a straightforward process that can elevate the quality of your charts. With the steps outlined in this guide, you can easily access and utilize the default color scheme to create compelling visualizations for your projects. Start exploring the world of colors in Plotly.js and make your data come to life!