Skip to main content
PHP Blog

Back to all posts

How to Change Label Color With Chart.js?

Published on
4 min read
How to Change Label Color With Chart.js? image

Best Tools to Change Label Color with Chart.js to Buy in October 2025

1 D3.js in Action, Third Edition

D3.js in Action, Third Edition

BUY & SAVE
$53.50 $69.99
Save 24%
D3.js in Action, Third Edition
2 NELOMO 11.8” X 7.9” Toolbox Reference Card Toolbox Accessories Conversion Chart Card SAE Metric Ruler Standard Metric Conversion Charts Tap Drill Sizes Wrench Conversion Chart

NELOMO 11.8” X 7.9” Toolbox Reference Card Toolbox Accessories Conversion Chart Card SAE Metric Ruler Standard Metric Conversion Charts Tap Drill Sizes Wrench Conversion Chart

  • ESSENTIAL TOOLBOX REFERENCE: CONVERSIONS, SIZES, AND CHARTS IN ONE CARD!

  • DURABLE, LAMINATED DESIGN: WITHSTANDS FRICTION, IDEAL FOR ANY WORKSPACE!

  • PORTABLE AND VERSATILE: PERFECT FOR BOTH INDOOR AND OUTDOOR PROJECTS!

BUY & SAVE
$5.99
NELOMO 11.8” X 7.9” Toolbox Reference Card Toolbox Accessories Conversion Chart Card SAE Metric Ruler Standard Metric Conversion Charts Tap Drill Sizes Wrench Conversion Chart
3 The Official Guide to Mermaid.js: Create complex diagrams and beautiful flowcharts easily using text and code

The Official Guide to Mermaid.js: Create complex diagrams and beautiful flowcharts easily using text and code

BUY & SAVE
$38.68 $43.99
Save 12%
The Official Guide to Mermaid.js: Create complex diagrams and beautiful flowcharts easily using text and code
4 D3.js in Action: Data visualization with JavaScript

D3.js in Action: Data visualization with JavaScript

BUY & SAVE
$31.94 $44.99
Save 29%
D3.js in Action: Data visualization with JavaScript
5 Host Defense The Mushroom Cultivator: A Practical Guide to Growing Mushrooms at Home by Paul Stamets and J.S. Chilton - Book About Mycology & Growing Mushrooms at-Home - Mushroom Growing Guide

Host Defense The Mushroom Cultivator: A Practical Guide to Growing Mushrooms at Home by Paul Stamets and J.S. Chilton - Book About Mycology & Growing Mushrooms at-Home - Mushroom Growing Guide

  • MASTER 15 MUSHROOM TYPES WITH EXPERT GUIDANCE FROM PAUL STAMETS.
  • LEARN CULTIVATION TIPS IN THE GROWER'S BIBLE FOR ULTIMATE SUCCESS.
  • GROW CERTIFIED ORGANIC MUSHROOMS, NON-GMO, AND GLUTEN-FREE AT HOME.
BUY & SAVE
$34.95
Host Defense The Mushroom Cultivator: A Practical Guide to Growing Mushrooms at Home by Paul Stamets and J.S. Chilton - Book About Mycology & Growing Mushrooms at-Home - Mushroom Growing Guide
6 J. S. Bach Mandolin Duets

J. S. Bach Mandolin Duets

BUY & SAVE
$19.99
J. S. Bach Mandolin Duets
7 J.S. Bach Mandolin Songbook: Mandolin Play-Along Volume 4

J.S. Bach Mandolin Songbook: Mandolin Play-Along Volume 4

BUY & SAVE
$11.99
J.S. Bach Mandolin Songbook: Mandolin Play-Along Volume 4
+
ONE MORE?

To change the label color in Chart.js, you can use the options object in your chart configuration. Within the options object, specify the scales property, and then define the yAxes property to access the y-axis options. Within the y-axis options, there is a ticks property where you can define the fontColor property to set the label color. Simply assign a color value (e.g., 'red', '#ff0000') to the fontColor property to change the label color in your chart.

How to change label color for different datasets in Chart.js?

To change label color for different datasets in Chart.js, you can use the "backgroundColor" property within the dataset object. Here's an example:

var ctx = document.getElementById('myChart').getContext('2d');

var myChart = new Chart(ctx, { type: 'bar', data: { labels: ['Dataset 1', 'Dataset 2', 'Dataset 3'], datasets: [{ label: 'Data 1', data: [10, 20, 30], backgroundColor: 'rgba(255, 0, 0, 0.2)' // Red color for Dataset 1 }, { label: 'Data 2', data: [15, 25, 35], backgroundColor: 'rgba(0, 255, 0, 0.2)' // Green color for Dataset 2 }, { label: 'Data 3', data: [20, 30, 40], backgroundColor: 'rgba(0, 0, 255, 0.2)' // Blue color for Dataset 3 }] } });

In this example, each dataset specifies a different background color using the "backgroundColor" property. You can customize the color by specifying the RGB values or using predefined color names.

How to change label opacity in Chart.js?

To change label opacity in Chart.js, you can use the fontColor property of the options object for the specific chart type you are working with. Here's an example of how you can set the opacity of the labels in a line chart:

var ctx = document.getElementById('myChart').getContext('2d'); var myChart = new Chart(ctx, { type: 'line', data: { labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'], datasets: [{ label: 'My Dataset', data: [65, 59, 80, 81, 56, 55, 40], borderColor: 'rgba(255, 99, 132, 1)', backgroundColor: 'rgba(255, 99, 132, 0.2)' }] }, options: { scales: { yAxes: [{ ticks: { beginAtZero: true } }], xAxes: [{ ticks: { fontColor: 'rgba(0, 0, 0, 0.5)' } }] } } });

In this code snippet, the fontColor property of the xAxes object is set to rgba(0, 0, 0, 0.5), which means that the labels on the x-axis will have an opacity of 0.5. You can adjust the values in the rgba function to set the desired opacity level for the labels.

How to set a default label color in Chart.js?

To set a default label color in Chart.js, you can use the options object within the chart configuration to specify a default color for all labels. Here's an example of how you can set a default label color to red:

var chart = new Chart(ctx, { type: 'bar', data: { labels: ["January", "February", "March", "April", "May", "June", "July"], datasets: [{ label: 'Sales', data: [12, 19, 3, 5, 2, 3, 20], backgroundColor: 'rgba(255, 99, 132, 0.2)', borderColor: 'rgba(255, 99, 132, 1)', borderWidth: 1 }] }, options: { scales: { yAxes: [{ ticks: { beginAtZero: true } }] }, legend: { labels: { fontColor: 'red' // Default label color } } } });

In this example, the default color for all labels in the legend will be set to red. You can replace 'red' with any other color value that you prefer.

How to animate label color changes in Chart.js?

To animate label color changes in Chart.js, you can use the animation settings provided by the library. Here is an example of how you can animate label color changes in a Chart.js chart:

  1. Create a new Chart.js chart and define your data and options:

var ctx = document.getElementById('myChart').getContext('2d'); var myChart = new Chart(ctx, { type: 'bar', data: { labels: ['Red', 'Blue', 'Yellow', 'Green', 'Purple', 'Orange'], datasets: [{ label: 'My Dataset', data: [12, 19, 3, 5, 2, 3], backgroundColor: [ 'red', 'blue', 'yellow', 'green', 'purple', 'orange' ] }] }, options: { animation: { duration: 1000, easing: 'linear' } } });

  1. To animate label color changes, you can update the dataset's backgroundColor property with the new colors you want to animate. Then call the update method on the chart instance to apply the changes:

// Change label colors to new colors myChart.data.datasets[0].backgroundColor = [ 'pink', 'skyblue', 'lightyellow', 'lightgreen', 'orchid', 'lightsalmon' ];

// Update chart to apply changes with animation myChart.update();

By updating the backgroundColor property and calling the update method on the chart instance, you can animate the label color changes in a Chart.js chart. You can customize the animation duration and easing function in the options object provided when creating the chart.