Color tweaking functions

Are there any plans to implement color 'tweaking' functions in css?

I've used the following syntax in a preprocessor to good effect:

h-adjust( red 10% ) => rotate hue 10%
s-adjust( hotpink -100% )  => desaturate
l-adjust( #f00 15% ) => lighten 10%
a-adjust( rgb(0,0,255) -10% ) => reduce opacity 10%

In SASS and LESS:

lighten()
darken()
saturate()
desaturate()
spin()
fade()


It 's very useful when creating gradients:

linear-gradient( top, green, l-adjust( green 10% ) )


Or, for situations when you want to maintain a branded color palette but
increase contrast:

.regular-link {
   color: l-adjust( $( coca-cola-red ) -10% )
}





-- 
Pete Boere
Web Developer