contrast() - CSS: Cascading Style Sheets 编辑

The contrast() CSS function adjusts the contrast of the input image. Its result is a <filter-function>.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

Syntax

contrast(amount)

Parameters

amount

The contrast of the result, specified as a <number> or a <percentage>. A value under 100% decreases the contrast, while a value over 100% increases it. A value of 0% will create an image that is completely gray, while a value of 100% leaves the input unchanged. The lacuna value for interpolation is 1.

Examples

Setting contrast using numbers and percentages

contrast(0)     /* Completely gray */
contrast(65%)   /* 65% contrast */
contrast(1)     /* No effect */
contrast(200%)  /* Double contrast */

Specifications

Specification	Status
Filter Effects Module Level 1 The definition of 'contrast()' in that specification.	Working Draft

See also

• <filter-function>
• blur()
• brightness()
• drop-shadow()
• grayscale()
• hue-rotate()
• invert()
• opacity()
• saturate()
• sepia()