How to Change Background Color of Mat-Chip of Angular Material 18: A Step-by-Step Guide

Are you tired of the default background color of mat-chip in your Angular Material 18 application? Do you want to customize it to match your brand’s color scheme or just to give it a fresh look? Well, you’re in luck! In this article, we’ll take you through a comprehensive guide on how to change the background color of mat-chip in Angular Material 18.

Why Change the Background Color of Mat-Chip?

Mat-chips are a popular component in Angular Material 18, used to display small pieces of information such as tags, labels, or icons. By default, mat-chips come with a default background color that may not align with your application’s design or branding. Changing the background color can help you:

• Create a consistent visual appeal across your application
• Highlight important information or categorize data
• Enhance user experience with a customized look and feel
• Differentiate your application from others

Understanding Mat-Chip CSS Classes

Before we dive into changing the background color, it’s essential to understand the CSS classes used by mat-chip. Mat-chip uses the following classes to style its background:

.mat-chip {
  background-color: #757575; /* default background color */
  color: #fff; /* default text color */
}

The `.mat-chip` class sets the default background color to `#757575` and text color to `#fff`. We’ll use these classes to override the default styles and apply our custom background color.

Method 1: Using CSS to Change Background Color

The simplest way to change the background color of mat-chip is by using CSS. You can add the following code to your component’s CSS file:

.mat-chip {
  background-color: #your-desired-color !important;
}

Replace `#your-desired-color` with the hexadecimal code of your desired background color. The `!important` flag ensures that our custom style overrides the default style.

For example, if you want to change the background color to `#33b5e5`, your code would look like this:

.mat-chip {
  background-color: #33b5e5 !important;
}

Method 2: Using Angular Material’s Color Palette

Angular Material 18 provides a robust color palette system that allows you to customize the appearance of your application. You can use this system to change the background color of mat-chip.

First, you need to import the `MatChipModule` and `MatChipColor` in your component:

import { MatChipModule, MatChipColor } from '@angular/material/chips';

Next, add the following code to your component’s template:

<mat-chip>
  <mat-chip-label>Chip Label</mat-chip-label>
</mat-chip>

Now, use the `color` property to change the background color of the mat-chip:

<mat-chip [color]="'primary'"></mat-chip>

In this example, we’re using the `primary` color palette to change the background color. You can replace `primary` with any other color palette defined in your application.

Method 3: Using a Custom Chip Component

If you want more control over the styling and behavior of your mat-chip, you can create a custom chip component. This approach requires more code, but it provides ultimate flexibility.

Create a new component, e.g., `custom-chip.component.ts`:

import { Component, Input } from '@angular/core';
import { MatChip } from '@angular/material/chips';

@Component({
  selector: 'app-custom-chip',
  template: `
    <mat-chip [style.background-color]="backgroundColor">
      <mat-chip-label>{{ label }}</mat-chip-label>
    </mat-chip>
  `,
})
export class CustomChipComponent {
  @Input() label: string;
  @Input() backgroundColor: string;
}

In this example, we’re creating a custom chip component with two input properties: `label` and `backgroundColor`. We’re using the `style.background-color` property to set the background color of the mat-chip.

Use your custom chip component in your template:

<app-custom-chip [label]="'Custom Chip'" [backgroundColor]="'#33b5e5'"></app-custom-chip>

Overriding Mat-Chip CSS Classes using ::ng-deep

In some cases, you might need to override the CSS classes of mat-chip using the `::ng-deep` pseudo-element. This is useful when you want to change the background color of a specific mat-chip instance.

::ng-deep .mat-chip.custom {
  background-color: #your-desired-color !important;
}

In this example, we’re using the `::ng-deep` pseudo-element to target the `.mat-chip` class and apply the custom background color. We’re also adding a custom class `custom` to the mat-chip element:

<mat-chip class="custom">
  <mat-chip-label>Chip Label</mat-chip-label>
</mat-chip>

Conclusion

In this article, we’ve explored three methods to change the background color of mat-chip in Angular Material 18. Whether you choose to use CSS, Angular Material’s color palette, or a custom chip component, you now have the knowledge to customize the appearance of your mat-chip to match your application’s design and branding.

FAQs

1. Does changing the background color of mat-chip affect its text color?

   No, changing the background color of mat-chip only affects the background color. You can change the text color separately using the `color` property or CSS.

2. Can I change the background color of mat-chip dynamically?

   Yes, you can change the background color of mat-chip dynamically using Angular’s property binding or by using a custom chip component.

3. What is the default background color of mat-chip?

   The default background color of mat-chip is `#757575`.

Method	Description	Code Example
Using CSS	Overriding the default background color using CSS	.mat-chip { background-color: #your-desired-color !important; }
Using Angular Material’s Color Palette	Changing the background color using Angular Material’s color palette	<mat-chip [color]="'primary'"></mat-chip>
Using a Custom Chip Component	Creating a custom chip component with custom styling	<app-custom-chip [label]="'Custom Chip'" [backgroundColor]="'#33b5e5'"></app-custom-chip>

We hope this comprehensive guide has helped you understand how to change the background color of mat-chip in Angular Material 18. If you have any more questions or need further assistance, feel free to ask!

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