less - Conditional CSS based on background color variable -

is possible set color based on lightness/darkness of less variable?

currently have following code:

li {     color: darken(@bodybackground, 10%); } 

this works providing @bodybackground light color. if dark color i'd use lighten(@bodybackground, 10%). possible less?

there's contrast function, e.g.:

li {     color: contrast(@bodybackground,             lighten(@bodybackground, 13%),              darken(@bodybackground, 13%)); }