grayscale() - CSS: Cascading Style Sheets 编辑

The grayscale() CSS function converts the input image to grayscale. Its result is a <filter-function>.

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Syntax

grayscale(amount)

Parameters

amount

The amount of the conversion, specified as a <number> or a <percentage>. A value of 100% is completely grayscale, while a value of 0% leaves the input unchanged. Values between 0% and 100% are linear multipliers on the effect. Default value when omitted is 1. The initial value for interpolation is 0.

Examples

Examples of correct values for grayscale()

grayscale(0)     /* No effect */
grayscale(.7)    /* 70% grayscale */
grayscale(100%)  /* Completely grayscale */

Specifications

See also

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