Given a colour as input, how do you transform it in LESS so that it becomes darker if it's a light colour, or lighter if it's a dark colour? For example: when the colour is dark , the result is something like darken(@color-input, 10%) when the colour is light , the result is something like lighten(@color-input, 10%) Is there any conditional test that can be applied or any color operation that would give this result?

How to make a colour darker if light, or lighter if dark in LESS

Given a colour as input, how do you transform it in LESS so that it becomes darker if it's a light colour, or lighter if it's a dark colour?

For example:

when the colour is dark, the result is something like darken(@color-input, 10%)
when the colour is light, the result is something like lighten(@color-input, 10%)

Is there any conditional test that can be applied or any color operation that would give this result?