CSS Attributes Index   CSS Filters

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Selectively renders a specific color transparent for the selected visual object.

{ filter: chroma ( color=color ) }

color

Value of the color to be subject to chromakey transparency. Color is expressed in #RRGGBB format, where RR is the red hexadecimal value, GG is the green hexadecimal value, and BB is the blue hexadecimal value.

This effect is not recommended for files that have been dithered from 24 to 8 bit. In particular, JPEG files, as dithered and compressed files, do not produce an entirely solid chromakey color, resulting in uneven effects. Chromakey doesn't work well on anti-aliased sources, in which sharp lines are smoothed by blending the colors of surrounding pixels. Choosing a specific chromakey color will cause some colors that would otherwise be transparent to be fully opaque.

CSS Filter Properties and Methods