A simple Ruby library to perform operations on RGB and HSL colours.
Instantiate an RGB (red, green, blue) colour:
orange = ColorMath::RGB.new(1.0, 0.5, 0)
Or from a hex value via a helper method:
white = ColorMath::hex_color("#fff") blue = ColorMath::hex_color("#0000ff")
Instantiate an HSL (hue, saturation, luminance) colour:
pink = ColorMath::HSL.new(350, 1, 0.88)
Retrieve the RGB components of a colour:
pink.red # => 1.0 pink.green # => 0.76 pink.blue # => 0.8
Or the HSL components:
orange.hue # => 30.0 orange.saturation # => 1.0 orange.luminance # => 0.5
Combine two colours via an alpha blend, e.g. 30% orange on white:
combined = ColorMath::Blend.alpha(white, orange, 0.3)
Convert a colour to hexadecimal representation:
combined.hex # => "#ffd8b2"
That’s it. It only does the basics that I need for the job in hand, but it’s probably a good basis for extension.