sepia()
The sepia() CSS function converts the input image to sepia, giving it a warmer, more yellow/brown appearance. Its result is a <filter-function>.
Syntax
sepia(amount)
Parameters
amount-  
The amount of the conversion, specified as a
<number>or a<percentage>. A value of100%is completely sepia, while a value of0%leaves the input unchanged. Values between0%and100%are linear multipliers on the effect. The lacuna value for interpolation is0. 
Examples
Examples of correct values for sepia()
sepia(0) /* No effect */ sepia(.65) /* 65% sepia */ sepia(100%) /* Completely sepia */
Specifications
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
sepia() | 
18  | 
12  | 
35  | 
No  | 
15  | 
6  | 
4.4  | 
53  | 
35  | 
14  | 
6  | 
6.0  | 
See also
<filter-function>blur()brightness()contrast()drop-shadow()grayscale()hue-rotate()invert()opacity()saturate()
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    https://developer.mozilla.org/en-US/docs/Web/CSS/filter-function/sepia()