How to use SASS color functions with Middleman

I am trying to use the SASS color functions and get an error compiling CSS. Can anybody tell me how to use these?

http://sass-lang.com/documentation/Sass/Script/Functions.html

Im a a newbie, but,

Could you explain a bit more, your setup, and the errors.

my guesses:

are your files .scss ?
can u use sass others features like variables etc ?

other than that i would sugegst checking out these:

https://middlemanapp.com/advanced/asset_pipeline/

Hi Giorgio,
yes I can use mixins, variables, nesting and all the other SASS features.

I am using Sass’ @import rule, the underscore-notation and the .scss extension.

Everything works great, except using SASS Functions.

I don’t know what I did the other day,… it works! :stuck_out_tongue_closed_eyes: