Free Online CSS Variable Generator Tool

Generate CSS triangles online instantly with this free CSS Triangle Generator. Use the tool below to create pure CSS triangle shapes, arrows, pointers, tooltip triangles and border-based CSS triangle code for your website or interface.

CSS variable settings

Generate CSS custom properties for colors, spacing, radius, shadows and typography tokens.

Variable tokens

Pick the token groups you want to export and customize the main design values.

Base spacing 16px
Radius 18px
Shadow opacity 18%
Base font size 16px

Token preview

Live preview

Preview how the generated CSS variables affect real UI components.

Variable powered UI Colors, spacing, radius, shadows and typography are all controlled by generated CSS variables.
Primary Token based card
Surface Reusable styles
Spacing Consistent layout

Generated CSS

Variable summary :root · --brand-primary · --brand-space-md

Saved variable sets

Recent and favorite variable sets are saved locally in this browser.

Recent variable sets

Favorite variable sets

What is a CSS Variable Generator?

A CSS Variable Generator is an online tool that helps you create reusable CSS custom properties. Instead of writing variables manually, you can define names, values and groups, preview the generated code and copy clean CSS variables for your project.

CSS variables, also called custom properties, let you store reusable values in your stylesheet. You can use them for colors, spacing, font sizes, border radius values, shadows, gradients, breakpoints and other design tokens.

This CSS Variable Generator runs directly in your browser, making it fast and simple to create CSS custom properties without installing software.

What can you use it for?

You can use this online CSS variable generator to create color palettes, theme variables, spacing systems, design tokens, dark mode values, typography scales, shadow variables, border radius variables and reusable CSS foundations.

For example, you may want to create variables for brand colors, button colors, card radius, section spacing, font sizes, box shadows or a full :root token system for a website.

How to use the CSS Variable Generator

Step 1: Add your variable names

Create variable names for your colors, spacing values, typography, shadows, radius values or other reusable CSS properties.

Step 2: Set the variable values

Enter the value for each CSS variable, such as a hex color, pixel value, rem value, gradient, shadow or custom CSS value.

Step 3: Copy the CSS code

Copy the generated CSS variables and paste them into your stylesheet, component, theme, page builder or frontend project.

CSS variable options

This CSS Variable Generator can help with common custom property tasks such as:

  • Generate CSS variables online
  • Create CSS custom properties
  • Generate :root variables
  • Create color variables
  • Create spacing variables
  • Create typography variables
  • Create border radius variables
  • Create shadow variables
  • Create gradient variables
  • Create design tokens
  • Create theme variables
  • Create dark mode variables
  • Create reusable CSS values
  • Organize CSS token groups
  • Generate clean CSS code
  • Copy CSS variables instantly
  • Use the tool without installing software

The final CSS output may depend on the variable names, values, naming convention and how the generated code is applied in your project.

What are CSS variables?

CSS variables are reusable values defined with custom property names. They usually start with two hyphens and can be reused throughout your CSS with the var() function.

A basic CSS variable looks like this:

:root {
  --primary-color: #2563eb;
}

You can then use it anywhere in your CSS:

.button {
  background: var(--primary-color);
}

CSS variables make stylesheets easier to maintain because you can update a value in one place and reuse it across many components.

Basic CSS variable example

A simple set of CSS variables can be defined inside :root.

:root {
  --color-primary: #2563eb;
  --color-secondary: #ec4899;
  --color-text: #111827;
  --color-background: #ffffff;
  --radius-md: 12px;
  --spacing-md: 24px;
}

These variables can then be used across buttons, cards, sections, forms and other UI components.

.card {
  background: var(--color-background);
  color: var(--color-text);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
}

CSS custom properties syntax

CSS custom properties use a name that starts with --.

--variable-name: value;

To use the variable, place it inside the var() function.

property: var(--variable-name);

A complete example:

:root {
  --button-bg: #2563eb;
  --button-text: #ffffff;
}

.button {
  background: var(--button-bg);
  color: var(--button-text);
}

Common CSS variable examples

Color variables

Color variables are useful for brand colors, text colors, backgrounds, borders and UI states.

:root {
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-accent: #ec4899;
  --color-text: #111827;
  --color-muted: #6b7280;
  --color-border: #e5e7eb;
  --color-background: #ffffff;
}

Spacing variables

Spacing variables help keep margins, padding and layout gaps consistent.

:root {
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 40px;
}

Border radius variables

Radius variables help keep rounded corners consistent across buttons, cards and containers.

:root {
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 24px;
  --radius-pill: 999px;
}

Typography variables

Typography variables can store font sizes, line heights and font weights.

:root {
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 2rem;
  --line-height-base: 1.6;
}

Shadow variables

Shadow variables are useful for cards, buttons, dropdowns and modals.

:root {
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 12px 30px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.18);
}

What is in CSS?

The :root selector targets the highest-level element in the document. In HTML, this is usually the <html> element.

CSS variables are often placed in :root because it makes them available globally across the stylesheet.

:root {
  --color-primary: #2563eb;
}

You can then use that variable in any component:

.button {
  background: var(--color-primary);
}

Using :root is common for global design tokens, theme values and reusable CSS systems.

CSS variables with fallback values

The var() function can include a fallback value. This fallback is used if the variable is missing or invalid.

.button {
  background: var(--color-primary, #2563eb);
}

In this example, the button uses --color-primary if it exists. If not, it uses #2563eb.

Fallbacks can make your CSS more resilient, especially in reusable components or design systems.

CSS variables for dark mode

CSS variables are very useful for dark mode because you can redefine the same variables under a different selector.

:root {
  --color-background: #ffffff;
  --color-text: #111827;
  --color-card: #f9fafb;
}

.dark {
  --color-background: #0f172a;
  --color-text: #f8fafc;
  --color-card: #1e293b;
}

Then your components can use the same variable names:

body {
  background: var(--color-background);
  color: var(--color-text);
}

.card {
  background: var(--color-card);
}

This makes theme switching much easier.

CSS variables for buttons

You can use CSS variables to create flexible button styles.

:root {
  --button-bg: #2563eb;
  --button-bg-hover: #1d4ed8;
  --button-text: #ffffff;
  --button-radius: 12px;
  --button-padding: 12px 24px;
}

.button {
  background: var(--button-bg);
  color: var(--button-text);
  border-radius: var(--button-radius);
  padding: var(--button-padding);
}

.button:hover {
  background: var(--button-bg-hover);
}

This makes it easier to update button styling across the whole project.

CSS variables for cards

Card components can use variables for background, border, radius, spacing and shadow.

:root {
  --card-bg: #ffffff;
  --card-border: #e5e7eb;
  --card-radius: 24px;
  --card-padding: 24px;
  --card-shadow: 0 16px 40px rgba(0, 0, 0, 0.08);
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: var(--card-padding);
  box-shadow: var(--card-shadow);
}

This is useful for design systems, UI kits, landing pages and reusable components.

CSS variables for design tokens

Design tokens are named values that represent design decisions. CSS variables are a practical way to implement design tokens directly in CSS.

Common design tokens include:

  • Brand colors
  • Text colors
  • Background colors
  • Spacing values
  • Font sizes
  • Line heights
  • Border radius values
  • Shadows
  • Gradients
  • Z-index values
  • Animation durations
  • Easing functions

By generating CSS variables for these values, you can make your project more consistent and easier to maintain.

Naming CSS variables

A good naming system makes CSS variables easier to understand and reuse.

Simple naming

:root {
  --primary: #2563eb;
  --secondary: #ec4899;
}

Category-based naming

:root {
  --color-primary: #2563eb;
  --color-secondary: #ec4899;
  --space-md: 16px;
  --radius-lg: 24px;
}

Component-based naming

:root {
  --button-bg: #2563eb;
  --button-text: #ffffff;
  --button-radius: 12px;
}

Category-based naming is often a good balance for websites and design systems.

CSS variables vs Sass variables

CSS variables

CSS variables are native browser features. They can change at runtime, work with themes and can be updated with classes, media queries or JavaScript.

:root {
  --color-primary: #2563eb;
}

Sass variables

Sass variables are processed before the CSS reaches the browser. They are useful during development, but they do not update at runtime unless the stylesheet is recompiled.

$color-primary: #2563eb;

Use CSS variables when you need dynamic theming, runtime changes or native custom properties. Use Sass variables when you need preprocessor features during development.

CSS variables vs regular CSS values

Regular CSS values

With regular CSS values, the same value may be repeated many times.

.button {
  background: #2563eb;
}

.link {
  color: #2563eb;
}

CSS variables

With CSS variables, the value can be stored once and reused.

:root {
  --color-primary: #2563eb;
}

.button {
  background: var(--color-primary);
}

.link {
  color: var(--color-primary);
}

This makes updates faster and reduces inconsistencies.

Why use a CSS Variable Generator?

A visual CSS Variable Generator helps you create custom properties faster. Instead of manually writing every variable, you can define names and values, organize them into groups and copy clean CSS code when it is ready.

This is useful for designers, developers, students, frontend builders, WordPress users, Elementor users and anyone building reusable website styles.

It can also help you create a consistent design foundation before styling buttons, cards, layouts, forms, navigation, dark mode and responsive components.

CSS variable design tips

Use clear names

Choose variable names that explain what the value is for, such as --color-primary or --space-lg.

Group related variables

Organize variables by category, such as colors, spacing, typography, shadows and radius values.

Avoid overly specific names

A variable like --blue-500 can be more reusable than --homepage-button-blue if the value is used in many places.

Use semantic tokens

Semantic names such as --color-background, --color-text and --color-border are useful for themes and dark mode.

Keep values consistent

CSS variables are most useful when they create consistency across your interface.

Use fallbacks when needed

Fallback values inside var() can make reusable components safer.

Document your system

For larger projects, keep a list of variable names and intended usage so your CSS stays maintainable.

Common CSS variable use cases

For color systems

Create reusable color variables for brand colors, text, backgrounds, borders, accents and states.

For spacing systems

Generate spacing variables for margins, padding, gaps and section layouts.

For typography

Create font size, line height, letter spacing and font weight variables.

For dark mode

Redefine variables under a dark mode selector to switch themes easily.

For design systems

Create reusable design tokens that keep your UI consistent across pages and components.

For cards

Create card background, border, padding, radius and shadow variables.

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Frequently Asked Questions

Is this CSS Variable Generator free?

Yes. This CSS Variable Generator is completely free to use.

No. You can generate CSS variables directly in your browser without installing software.

CSS variables are reusable custom properties that store values you can use throughout your stylesheet.

A CSS custom property is a variable-like CSS value that starts with two hyphens, such as --color-primary.

You can use a CSS variable with the var() function, such as color: var(--color-primary);.

:root is commonly used to define global CSS variables that can be accessed throughout the stylesheet.

Yes. You can create reusable color variables for brand colors, text colors, backgrounds, borders and UI states.

Yes. You can create spacing variables for margins, padding, gaps and layout spacing.

Yes. CSS variables are very useful for dark mode because you can redefine the same variable names under a dark theme selector.

Yes. After creating your variables, you can copy the generated CSS code and use it in your project.

Yes. You can copy the generated CSS and use it in WordPress, Elementor, custom CSS fields, blocks, themes or frontend projects.

No. CSS variables work natively in the browser and can change at runtime. Sass variables are compiled before the CSS reaches the browser.

Yes. The var() function can include a fallback value, such as var(--color-primary, #2563eb).

Yes. CSS variables are very useful for design systems because they can store reusable design tokens such as colors, spacing, radius values and shadows.

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