heygrady/scss-blend-modes — pull request #7 by timhettler (2013-04-24 21:45:01+00:00)
Title: Avoiding divide by zero error

the hsl-to-hsv() and hsv-to-hsl() function will produce NaN values if $ll or $v is set to 0. I've added logic to guard against this, so these functions always return a valid color.