a genericized version of lighten/darken so that negative values can be used.
# File lib/compass/sass_extensions/functions/colors.rb, line 4 def adjust_lightness(color, amount) assert_type color, :Color assert_type amount, :Number color.with(:lightness => Compass::Util.restrict(color.lightness + amount.value, 0..100)) end
a genericized version of saturation/desaturate so that negative values can be used.
# File lib/compass/sass_extensions/functions/colors.rb, line 20 def adjust_saturation(color, amount) assert_type color, :Color assert_type amount, :Number color.with(:saturation => Compass::Util.restrict(color.saturation + amount.value, 0..100)) end
returns an IE hex string for a color with an alpha channel suitable for passing to IE filters.
# File lib/compass/sass_extensions/functions/colors.rb, line 37 def ie_hex_str(color) assert_type color, :Color alpha = (color.alpha * 255).round alphastr = alpha.to_s(16).rjust(2, '0') Sass::Script::String.new("##{alphastr}#{color.send(:hex_str)[1..-1]}".upcase) end
Scales a color’s lightness by some percentage. If the amount is negative, the color is scaled darker, if positive, it is scaled lighter. This will never return a pure light or dark color unless the amount is 100%.
# File lib/compass/sass_extensions/functions/colors.rb, line 13 def scale_lightness(color, amount) assert_type color, :Color assert_type amount, :Number color.with(:lightness => scale_color_value(color.lightness, amount.value)) end
Scales a color’s saturation by some percentage. If the amount is negative, the color is desaturated, if positive, it is saturated. This will never return a pure saturated or desaturated color unless the amount is 100%.
# File lib/compass/sass_extensions/functions/colors.rb, line 29 def scale_saturation(color, amount) assert_type color, :Color assert_type amount, :Number color.with(:saturation => scale_color_value(color.saturation, amount.value)) end
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