The application should define a primary and secondary color. The primary color should be chosen from one of the '-500' colors and the secondary should be one of the 'a-' colors.

The default color palette is defined as:

$md-primary-color: $md-indigo-500 !default;
$md-secondary-color: $md-pink-a-200 !default;
Sass (Scss)

If you change these variables before the react-md-everything mixin is included, your entire application will be styled with your new theme.

@import '~react-md/src/scss/react-md';

$md-primary-color: $md-teal-500;
$md-secondary-color: $md-lime-a-400;

@include react-md-everything;
Sass (Scss)

There can be times where your application's theme will change depending on the current navigation. To help with minimizing bundles and not having to recompile all the styles just for a new theme, every themeable component has a mixin to update the colors. In addition, the new styles will only be created if the new values do not match the global $md-primary-color, $md-secondary-color, or $md-light-theme variables.

The component that is themeable will have a mixin name react-md-theme-COMPONENT. For simplicity, there is also a react-md-theme-everything mixin that can be used.

Example usage:

@import '~react-md/src/scss/react-md';

$md-primary-color: $md-teal-500;
$md-secondary-color: $md-lime-a-400;
@include react-md-everything;

// All the components will now be themed using teal and lime.
// Now we want a dark theme using the same colors

@include react-md-theme-everything(
  false, // specifying dark-theme
  'dark-theme' // class name to wrap dark-theme styles in

// If you add the `dark-theme` class name to your `body` or `html` tags, your app will now
// be updated with the minimal amount of styles to theme to the dark theme.
Sass (Scss)

Check out the Theme Builder for a real world example, live updates, and some additional information about usage.

If all the components will not be used, and only a few should be updated with the new theme, you can update them at a component level.

@import '~react-md/src/scss/react-md';

@include react-md-theme-colors($md-light-blue-500, $md-orange-a-200, false);
Sass (Scss)

Even though there are a bunch of great colors available to you in react-md and material design, it is sometimes helpful to be able to define custom colors and not use defined colors to get a unique branding for your application. When you use a color that is not a part of material design, you will run hopefully see some Sass warnings about applying fallback colors. Follow the example below to understand these warnings and how to fix it.

Let's say that your app prefers the Flat UI Color Palette over the material design colors and would like to have a primary color of Belize Hole (#2980b9) and a secondary color of Wet Asphalt (#34495e).

// src/_variables.scss

// copy pasted from the flat ui color palette website
$turquoise: #1abc9c;
$green-sea: #16a085;
$sun-flower: #f1c40f;
$orange: #f39c12;
$emerald: #2ecc71;
$nephritis: #27ae60;
$carrot: #e67e22;
$pumpkin: #d35400;
$peter-river: #3498db;
$belize-hole: #2980b9;
$alizarin: #e74c3c;
$pomegranate: #c0392b;
$amethyst: #9b59b6;
$wisteria: #8e44ad;
$clouds: #ecf0f1;
$silver: #bdc3c7;
$wet-asphalt: #34495e;
$midnight-blue: #2c3e50;
$concrete: #95a5a6;
$asbestos: #7f8c8d;

// Start overriding react-md variables
$md-primary-color: $belize-hole;
$md-secondary-color: $wet-asphalt;

// When the primary or secondary colors are not part of material design, you will need to set
// some fallback colors for the the following components:
$md-data-table-contextual-fallback-color: rgba($wet-asphalt, .32);
$md-linear-progress-fallback-color: rgba($wet-asphalt, .54);
$md-switch-fallback-color: rgba($wet-asphalt, .87);

$md-slider-warn-md: false; // only need to set this if using the dark theme.
Sass (Scss)
// src/_globals.scss
// import main variables and overrides, then import react-md
@import 'variables';
@import 'react-md/src/scss/react-md';

@include react-md-everything;
Sass (Scss)

The reason the fallback colors need to be set is that it is "impossible" to get different swatches for the listed components when it is not a material design color. If these variables aren't set, the components won't gain any of the colors since the default value is null. If this doesn't really bother you, you can always set $md-colors-warn: false in your overrides and no compilation errors or warnings will be displayed.

Here are the values that would normally be applied. To make things easier, let's pretend that a "normal" config is using the theme of $md-primary-color: $md-blue-500 and $md-secondary-color: $md-purple-a-200.

$md-data-table-contextual-fallback-color: $md-purple-50;
$md-linear-progress-fallback-color: $md-purple-100;
$md-switch-ball-fallback-color: if($md-light-theme, $md-purple-500, $md-purple-200);
Sass (Scss)

For some more information check out the following documentation: