Image color transformation. Move mouse over the block below. Image should change color from system gamma to custom set.

But please don't ask me what is going on here...

Well... following is a definition of five strong points of interpolation curve - from pure grey to final color.

    foreground-image-transformation: color-schema(darksalmon,salmon,lightsalmon,peachpuff,antiquewhite);  
 
pixels which are not grey are not converted. That red ball is it. Use this feature when you will want to show the same image in different states.
Image color transformation. colorize