CSS Functions Reference
CSS Functions
CSS functions can be used to calculate values, manipulate strings or colors, create complex gradients and shapes, and more.
CSS functions are typically used as values for various CSS properties.
| Function | Description |
|---|---|
| acos() | Returns the inverse cosine of a number between -1 and 1 |
| asin() | Returns the inverse sine of a number between -1 and 1 |
| atan() | Returns the inverse tangent of a number between -∞ and ∞ |
| atan2() | Returns the inverse tangent of two values between -infinity and infinity |
| attr() | Returns the value of an attribute of the selected element |
| blur() | Applies a blur effect to an element |
| brightness() | Adjusts the brightness of an element (brighter or darker) |
| calc() | Allows you to perform calculations to determine CSS property values |
| circle() | Defines a circle |
| color() | Allows a color to be specified in a particular, specified color space |
| color-mix() | Mixes two color values in a given color space, by a given amount |
| conic-gradient() | Creates a conic gradient |
| contrast() | Adjusts the contrast of an element |
| cos() | Returns the cosine of an angle |
| counter() | Returns the current value of the named counter |
| counters() | Returns the current values of the named and nested counters |
| cubic-bezier() | Defines a Cubic Bezier curve |
| drop-shadow() | Applies a drop shadow effect to an image |
| ellipse() | Defines an ellipse |
| exp() | Returns E raised to the power of the specified number x (Ex) |
| fit-content() | Allows you to size an element based on its content |
| grayscale() | Converts an image to grayscale |
| hsl() / hsla() | Defines a color using the Hue-Saturation-Lightness model (HSL); with an optional alpha component |
| hue-rotate() | Applies a color rotation to an element |
| hwb() | Defines a color using the Hue-Whiteness-Blackness model (HWB); with an optional alpha component |
| hypot() | Returns the square root of the sum of squares of its parameters |
| inset() | Defines a rectangle at the specified inset distances from each side of the reference box |
| invert() | Inverts the color of an image |
| lab() | Specifies a color in the CIE L*a*b color space |
| lch() | Specifies a color in the LCH (Lightness-Chroma-Hue) color space |
| light-dark() | Enables two color-value settings, and returns the first value if the user has set a light color theme, and the second value if the user has set a dark color theme |
| linear-gradient() | Creates a linear gradient |
| log() | Returns the natural logarithm (base E) of a specified number, or the logarithm of the number to the specified base |
| matrix() | Defines a 2D transformation, using a matrix of six values |
| matrix3d() | Defines a 3D transformation, using a 4x4 matrix of 16 values |
| max() | Uses the largest value, from a comma-separated list of values, as the property value |
| min() | Uses the smallest value, from a comma-separated list of values, as the property value |
| minmax() | Defines a size range greater than or equal to a min value and less than or equal to a max value (used with CSS grids) |
| mod() | Returns the remainder left over when a number is divided by another number |
| oklab() | Specifies a color in the OKLAB color space |
| oklch() | Specifies a color in the OKLCH color space |
| opacity() | Applies an opacity effect to an element |
| polygon() | Defines a polygon |
| pow() | Returns the value of a number (x) raised to the power of another number (y) |
| radial-gradient() | Creates a radial gradient |
| ray() | Defines the offset-path line segment that an animated element should follow |
| rem() | Returns the remainder left over when a number is divided by another number |
| repeat() | Repeats a set of columns or rows in a grid |
| repeating-conic-gradient() | Repeats a conic gradient |
| repeating-linear-gradient() | Repeats a linear gradient |
| repeating-radial-gradient() | Repeats a radial gradient |
| rgb() / rgba() | Defines colors using the Red-Green-Blue model (RGB); with an optional alpha component |
| rotate() | Defines a 2D rotation of an element |
| rotate3d() | Defines a 3D rotation of an element |
| rotateX() | Defines a 3D rotation of an element around the x-axis (horizontal) |
| rotateY() | Defines a 3D rotation of an element around the y-axis (vertical) |
| rotateZ() | Defines a 3D rotation of an element around the z-axis |
| var() | Inserts the value of a custom property |
